769040981 has 2 divisors, whose sum is σ = 769040982. Its totient is φ = 769040980.

The previous prime is 769040959. The next prime is 769040983. The reversal of 769040981 is 189040967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 675532081 + 93508900 = 25991^2 + 9670^2 .

It is a cyclic number.

It is not a de Polignac number, because 769040981 - 2²⁶ = 701932117 is a prime.

It is a super-2 number, since 2×769040981² = 1182848060914884722, which contains 22 as substring.

Together with 769040983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769040983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384520490 + 384520491.

It is an arithmetic number, because the mean of its divisors is an integer number (384520491).

Almost surely, 2^769040981 is an apocalyptic number.

It is an amenable number.

769040981 is a deficient number, since it is larger than the sum of its proper divisors (1).

769040981 is an equidigital number, since it uses as much as digits as its factorization.

769040981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 769040981 is about 27731.5881442084. The cubic root of 769040981 is about 916.1849661913.

The spelling of 769040981 in words is "seven hundred sixty-nine million, forty thousand, nine hundred eighty-one".