1081554769 has 3 divisors (see below), whose sum is σ = 1081587657. Its totient is φ = 1081521882.

The previous prime is 1081554743. The next prime is 1081554779. The reversal of 1081554769 is 9674551801.

The square root of 1081554769 is 32887.

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.

It is a de Polignac number, because none of the positive numbers 2^k-1081554769 is a prime.

It is a super-2 number, since 2×1081554769² = 2339521436693286722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081554779) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16444 + ... + 49330.

It is an arithmetic number, because the mean of its divisors is an integer number (360529219).

Almost surely, 2^1081554769 is an apocalyptic number.

1081554769 is the 32887-th square number.

1081554769 is the 16444-th centered octagonal number.

It is an amenable number.

1081554769 is a deficient number, since it is larger than the sum of its proper divisors (32888).

1081554769 is an frugal number, since it uses more digits than its factorization.

1081554769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65774 (or 32887 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The cubic root of 1081554769 is about 1026.4776685299.

The spelling of 1081554769 in words is "one billion, eighty-one million, five hundred fifty-four thousand, seven hundred sixty-nine".