769813906 has 4 divisors (see below), whose sum is σ = 1154720862. Its totient is φ = 384906952.

The previous prime is 769813883. The next prime is 769813927. The reversal of 769813906 is 609318967.

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., 717757681 + 52056225 = 26791^2 + 7215^2 .

It is a super-2 number, since 2×769813906² = 1185226899741953672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 769813906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192453475 + ... + 192453478.

Almost surely, 2^769813906 is an apocalyptic number.

769813906 is a deficient number, since it is larger than the sum of its proper divisors (384906956).

769813906 is a wasteful number, since it uses less digits than its factorization.

769813906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384906955.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 769813906 is about 27745.5204672754. The cubic root of 769813906 is about 916.4918007967.

The spelling of 769813906 in words is "seven hundred sixty-nine million, eight hundred thirteen thousand, nine hundred six".