38948891 has 2 divisors, whose sum is σ = 38948892. Its totient is φ = 38948890.

The previous prime is 38948873. The next prime is 38948939. The reversal of 38948891 is 19884983.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38948891 is a prime.

It is a super-2 number, since 2×38948891² = 3034032220259762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38948801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19474445 + 19474446.

It is an arithmetic number, because the mean of its divisors is an integer number (19474446).

Almost surely, 2^38948891 is an apocalyptic number.

38948891 is a deficient number, since it is larger than the sum of its proper divisors (1).

38948891 is an equidigital number, since it uses as much as digits as its factorization.

38948891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 50.

The square root of 38948891 is about 6240.9046619861. The cubic root of 38948891 is about 338.9729415727.

The spelling of 38948891 in words is "thirty-eight million, nine hundred forty-eight thousand, eight hundred ninety-one".