38697181 has 2 divisors, whose sum is σ = 38697182. Its totient is φ = 38697180.

The previous prime is 38697179. The next prime is 38697187. The reversal of 38697181 is 18179683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37625956 + 1071225 = 6134^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 38697181 - 2¹ = 38697179 is a prime.

It is a super-2 number, since 2×38697181² = 2994943634693522, which contains 22 as substring.

Together with 38697179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38697187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19348590 + 19348591.

It is an arithmetic number, because the mean of its divisors is an integer number (19348591).

Almost surely, 2^38697181 is an apocalyptic number.

It is an amenable number.

38697181 is a deficient number, since it is larger than the sum of its proper divisors (1).

38697181 is an equidigital number, since it uses as much as digits as its factorization.

38697181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 38697181 is about 6220.7058281195. The cubic root of 38697181 is about 338.2411505731.

The spelling of 38697181 in words is "thirty-eight million, six hundred ninety-seven thousand, one hundred eighty-one".