764400349 has 4 divisors (see below), whose sum is σ = 764559936. Its totient is φ = 764240764.

The previous prime is 764400319. The next prime is 764400361. The reversal of 764400349 is 943004467.

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, and also an emirpimes, since its reverse is a distinct semiprime: 943004467 = 17 ⋅55470851.

It is a cyclic number.

It is not a de Polignac number, because 764400349 - 2¹³ = 764392157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764400319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72379 + ... + 82264.

It is an arithmetic number, because the mean of its divisors is an integer number (191139984).

Almost surely, 2^764400349 is an apocalyptic number.

It is an amenable number.

764400349 is a deficient number, since it is larger than the sum of its proper divisors (159587).

764400349 is a wasteful number, since it uses less digits than its factorization.

764400349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159586.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 764400349 is about 27647.7910329198. The cubic root of 764400349 is about 914.3383987812.

The spelling of 764400349 in words is "seven hundred sixty-four million, four hundred thousand, three hundred forty-nine".