38162981 has 2 divisors, whose sum is σ = 38162982. Its totient is φ = 38162980.

The previous prime is 38162959. The next prime is 38162983. The reversal of 38162981 is 18926183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37761025 + 401956 = 6145^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 38162981 - 2¹⁴ = 38146597 is a prime.

It is a super-2 number, since 2×38162981² = 2912826237612722, which contains 22 as substring.

Together with 38162983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38162983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19081490 + 19081491.

It is an arithmetic number, because the mean of its divisors is an integer number (19081491).

Almost surely, 2^38162981 is an apocalyptic number.

It is an amenable number.

38162981 is a deficient number, since it is larger than the sum of its proper divisors (1).

38162981 is an equidigital number, since it uses as much as digits as its factorization.

38162981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 38162981 is about 6177.6193634765. The cubic root of 38162981 is about 336.6775026193.

The spelling of 38162981 in words is "thirty-eight million, one hundred sixty-two thousand, nine hundred eighty-one".