38375621 has 2 divisors, whose sum is σ = 38375622. Its totient is φ = 38375620.

The previous prime is 38375609. The next prime is 38375627. The reversal of 38375621 is 12657383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 13764100 = 4961^2 + 3710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38375621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38375627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19187810 + 19187811.

It is an arithmetic number, because the mean of its divisors is an integer number (19187811).

Almost surely, 2^38375621 is an apocalyptic number.

It is an amenable number.

38375621 is a deficient number, since it is larger than the sum of its proper divisors (1).

38375621 is an equidigital number, since it uses as much as digits as its factorization.

38375621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 38375621 is about 6194.8059695199. The cubic root of 38375621 is about 337.3016550169.

The spelling of 38375621 in words is "thirty-eight million, three hundred seventy-five thousand, six hundred twenty-one".