38700643 has 2 divisors, whose sum is σ = 38700644. Its totient is φ = 38700642.

The previous prime is 38700589. The next prime is 38700661. The reversal of 38700643 is 34600783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38700643 - 2²¹ = 36603491 is a prime.

It is a super-2 number, since 2×38700643² = 2995479537226898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38701643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19350321 + 19350322.

It is an arithmetic number, because the mean of its divisors is an integer number (19350322).

Almost surely, 2^38700643 is an apocalyptic number.

38700643 is a deficient number, since it is larger than the sum of its proper divisors (1).

38700643 is an equidigital number, since it uses as much as digits as its factorization.

38700643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 38700643 is about 6220.9840861394. The cubic root of 38700643 is about 338.2512370610.

The spelling of 38700643 in words is "thirty-eight million, seven hundred thousand, six hundred forty-three".