38902639 has 2 divisors, whose sum is σ = 38902640. Its totient is φ = 38902638.

The previous prime is 38902561. The next prime is 38902663. The reversal of 38902639 is 93620983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38902639 - 2¹¹ = 38900591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38902439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19451319 + 19451320.

It is an arithmetic number, because the mean of its divisors is an integer number (19451320).

Almost surely, 2^38902639 is an apocalyptic number.

38902639 is a deficient number, since it is larger than the sum of its proper divisors (1).

38902639 is an equidigital number, since it uses as much as digits as its factorization.

38902639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 38902639 is about 6237.1980087215. The cubic root of 38902639 is about 338.8387110793.

The spelling of 38902639 in words is "thirty-eight million, nine hundred two thousand, six hundred thirty-nine".