764090709 has 4 divisors (see below), whose sum is σ = 1018787616. Its totient is φ = 509393804.

The previous prime is 764090683. The next prime is 764090729. The reversal of 764090709 is 907090467.

764090709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 764090709 - 2¹⁵ = 764057941 is a prime.

It is a super-2 number, since 2×764090709² = 1167669223160245362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764090729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127348449 + ... + 127348454.

It is an arithmetic number, because the mean of its divisors is an integer number (254696904).

Almost surely, 2^764090709 is an apocalyptic number.

It is an amenable number.

764090709 is a deficient number, since it is larger than the sum of its proper divisors (254696907).

764090709 is a wasteful number, since it uses less digits than its factorization.

764090709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254696906.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 764090709 is about 27642.1907416905. The cubic root of 764090709 is about 914.2149233543.

The spelling of 764090709 in words is "seven hundred sixty-four million, ninety thousand, seven hundred nine".