38693881 has 2 divisors, whose sum is σ = 38693882. Its totient is φ = 38693880.

The previous prime is 38693867. The next prime is 38693903. The reversal of 38693881 is 18839683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38638656 + 55225 = 6216^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 38693881 - 2⁵ = 38693849 is a prime.

It is a super-2 number, since 2×38693881² = 2994432853684322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38693821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19346940 + 19346941.

It is an arithmetic number, because the mean of its divisors is an integer number (19346941).

Almost surely, 2^38693881 is an apocalyptic number.

It is an amenable number.

38693881 is a deficient number, since it is larger than the sum of its proper divisors (1).

38693881 is an equidigital number, since it uses as much as digits as its factorization.

38693881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 38693881 is about 6220.4405792516. The cubic root of 38693881 is about 338.2315355099.

It can be divided in two parts, 3869 and 3881, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 38693881 in words is "thirty-eight million, six hundred ninety-three thousand, eight hundred eighty-one".