10643657 has 2 divisors, whose sum is σ = 10643658. Its totient is φ = 10643656.

The previous prime is 10643653. The next prime is 10643693. The reversal of 10643657 is 75634601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9066121 + 1577536 = 3011^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 10643657 - 2² = 10643653 is a prime.

It is a super-2 number, since 2×10643657² = 226574868667298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10643653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5321828 + 5321829.

It is an arithmetic number, because the mean of its divisors is an integer number (5321829).

Almost surely, 2^10643657 is an apocalyptic number.

It is an amenable number.

10643657 is a deficient number, since it is larger than the sum of its proper divisors (1).

10643657 is an equidigital number, since it uses as much as digits as its factorization.

10643657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 10643657 is about 3262.4618005427. The cubic root of 10643657 is about 219.9700854642.

The spelling of 10643657 in words is "ten million, six hundred forty-three thousand, six hundred fifty-seven".