749564397 has 6 divisors (see below), whose sum is σ = 1082704142. Its totient is φ = 499709592.

The previous prime is 749564377. The next prime is 749564441. The reversal of 749564397 is 793465947.

It is a happy number.

749564397 is a `hidden beast` number, since 7 + 49 + 564 + 39 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 649944036 + 99620361 = 25494^2 + 9981^2 .

It is not a de Polignac number, because 749564397 - 2²⁸ = 481128941 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 (749564327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41642458 + ... + 41642475.

Almost surely, 2^749564397 is an apocalyptic number.

It is an amenable number.

749564397 is a deficient number, since it is larger than the sum of its proper divisors (333139745).

749564397 is a wasteful number, since it uses less digits than its factorization.

749564397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83284939 (or 83284936 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 54.

The square root of 749564397 is about 27378.1737338340. The cubic root of 749564397 is about 908.3843638661.

The spelling of 749564397 in words is "seven hundred forty-nine million, five hundred sixty-four thousand, three hundred ninety-seven".