38269981 has 2 divisors, whose sum is σ = 38269982. Its totient is φ = 38269980.

The previous prime is 38269967. The next prime is 38269993. The reversal of 38269981 is 18996283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 6528025 = 5634^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 38269981 - 2⁵ = 38269949 is a prime.

It is a super-2 number, since 2×38269981² = 2929182891480722, 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 (38269901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19134990 + 19134991.

It is an arithmetic number, because the mean of its divisors is an integer number (19134991).

Almost surely, 2^38269981 is an apocalyptic number.

It is an amenable number.

38269981 is a deficient number, since it is larger than the sum of its proper divisors (1).

38269981 is an equidigital number, since it uses as much as digits as its factorization.

38269981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 38269981 is about 6186.2735956309. The cubic root of 38269981 is about 336.9918637805.

The spelling of 38269981 in words is "thirty-eight million, two hundred sixty-nine thousand, nine hundred eighty-one".