649757097 has 12 divisors (see below), whose sum is σ = 1023859824. Its totient is φ = 393792120.

The previous prime is 649757083. The next prime is 649757099. The reversal of 649757097 is 790757946.

It is a happy number.

649757097 is a `hidden beast` number, since 64 + 9 + 7 + 570 + 9 + 7 = 666.

It is not a de Polignac number, because 649757097 - 2⁸ = 649756841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649757099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3281503 + ... + 3281700.

It is an arithmetic number, because the mean of its divisors is an integer number (85321652).

Almost surely, 2^649757097 is an apocalyptic number.

It is an amenable number.

649757097 is a deficient number, since it is larger than the sum of its proper divisors (374102727).

649757097 is a wasteful number, since it uses less digits than its factorization.

649757097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563220 (or 6563217 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 54.

The square root of 649757097 is about 25490.3334030765. Note that the first 3 decimals coincide. The cubic root of 649757097 is about 866.1311882676.

The spelling of 649757097 in words is "six hundred forty-nine million, seven hundred fifty-seven thousand, ninety-seven".