769638239 has 2 divisors, whose sum is σ = 769638240. Its totient is φ = 769638238.

The previous prime is 769638227. The next prime is 769638253. The reversal of 769638239 is 932836967.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 769638239 - 2¹² = 769634143 is a prime.

It is a super-2 number, since 2×769638239² = 1184686037862042242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769608239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384819119 + 384819120.

It is an arithmetic number, because the mean of its divisors is an integer number (384819120).

Almost surely, 2^769638239 is an apocalyptic number.

769638239 is a deficient number, since it is larger than the sum of its proper divisors (1).

769638239 is an equidigital number, since it uses as much as digits as its factorization.

769638239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 53.

The square root of 769638239 is about 27742.3546044672. The cubic root of 769638239 is about 916.4220828160.

The spelling of 769638239 in words is "seven hundred sixty-nine million, six hundred thirty-eight thousand, two hundred thirty-nine".