764213697 has 20 divisors (see below), whose sum is σ = 1229420500. Its totient is φ = 470284704.

The previous prime is 764213693. The next prime is 764213701. The reversal of 764213697 is 796312467.

It is an interprime number because it is at equal distance from previous prime (764213693) and next prime (764213701).

It can be written as a sum of positive squares in 2 ways, for example, as 480661776 + 283551921 = 21924^2 + 16839^2 .

It is not a de Polignac number, because 764213697 - 2² = 764213693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764213693) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 361822 + ... + 363927.

It is an arithmetic number, because the mean of its divisors is an integer number (61471025).

Almost surely, 2^764213697 is an apocalyptic number.

It is an amenable number.

764213697 is a deficient number, since it is larger than the sum of its proper divisors (465206803).

764213697 is a wasteful number, since it uses less digits than its factorization.

764213697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725774 (or 725765 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 764213697 is about 27644.4152949561. The cubic root of 764213697 is about 914.2639713847.

The spelling of 764213697 in words is "seven hundred sixty-four million, two hundred thirteen thousand, six hundred ninety-seven".