37975643 has 2 divisors, whose sum is σ = 37975644. Its totient is φ = 37975642.

The previous prime is 37975627. The next prime is 37975711. The reversal of 37975643 is 34657973.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37975643 - 2⁴ = 37975627 is a prime.

It is a super-2 number, since 2×37975643² = 2884298922526898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 37975594 and 37975603.

It is not a weakly prime, because it can be changed into another prime (37975043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18987821 + 18987822.

It is an arithmetic number, because the mean of its divisors is an integer number (18987822).

Almost surely, 2^37975643 is an apocalyptic number.

37975643 is a deficient number, since it is larger than the sum of its proper divisors (1).

37975643 is an equidigital number, since it uses as much as digits as its factorization.

37975643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 44.

The square root of 37975643 is about 6162.4380727112. The cubic root of 37975643 is about 336.1256940684.

The spelling of 37975643 in words is "thirty-seven million, nine hundred seventy-five thousand, six hundred forty-three".