1331563834 has 4 divisors (see below), whose sum is σ = 1997345754. Its totient is φ = 665781916.

The previous prime is 1331563763. The next prime is 1331563853. The reversal of 1331563834 is 4383651331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 881911809 + 449652025 = 29697^2 + 21205^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1331563793 and 1331563802.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 332890957 + ... + 332890960.

Almost surely, 2^1331563834 is an apocalyptic number.

1331563834 is a deficient number, since it is larger than the sum of its proper divisors (665781920).

1331563834 is an equidigital number, since it uses as much as digits as its factorization.

1331563834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665781919.

The product of its digits is 77760, while the sum is 37.

The square root of 1331563834 is about 36490.5992551506. The cubic root of 1331563834 is about 1100.1553042430.

The spelling of 1331563834 in words is "one billion, three hundred thirty-one million, five hundred sixty-three thousand, eight hundred thirty-four".