1119638521 has 3 divisors (see below), whose sum is σ = 1119671983. Its totient is φ = 1119605060.

The previous prime is 1119638503. The next prime is 1119638549. The reversal of 1119638521 is 1258369111.

1119638521 = 23660² + 23661².

The square root of 1119638521 is 33461.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1258369111 = 461 ⋅2729651.

It can be written as a sum of positive squares in only one way, i.e., 559842921 + 559795600 = 23661^2 + 23660^2 .

It is not a de Polignac number, because 1119638521 - 2⁷ = 1119638393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1119608521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16731 + ... + 50191.

Almost surely, 2^1119638521 is an apocalyptic number.

1119638521 is the 33461-st square number.

1119638521 is the 23661-st centered square number and also the 16731-st centered octagonal number.

It is an amenable number.

1119638521 is a deficient number, since it is larger than the sum of its proper divisors (33462).

1119638521 is an frugal number, since it uses more digits than its factorization.

1119638521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66922 (or 33461 counting only the distinct ones).

The product of its digits is 12960, while the sum is 37.

The cubic root of 1119638521 is about 1038.3870834927.

The spelling of 1119638521 in words is "one billion, one hundred nineteen million, six hundred thirty-eight thousand, five hundred twenty-one".