38943631 has 2 divisors, whose sum is σ = 38943632. Its totient is φ = 38943630.

The previous prime is 38943601. The next prime is 38943643. The reversal of 38943631 is 13634983.

It is a strong prime.

It is an emirp because it is prime and its reverse (13634983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38943631 - 2¹⁹ = 38419343 is a prime.

It is a super-2 number, since 2×38943631² = 3033212790928322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38943601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19471815 + 19471816.

It is an arithmetic number, because the mean of its divisors is an integer number (19471816).

Almost surely, 2^38943631 is an apocalyptic number.

38943631 is a deficient number, since it is larger than the sum of its proper divisors (1).

38943631 is an equidigital number, since it uses as much as digits as its factorization.

38943631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 38943631 is about 6240.4832344939. The cubic root of 38943631 is about 338.9576815922.

The spelling of 38943631 in words is "thirty-eight million, nine hundred forty-three thousand, six hundred thirty-one".