38128999 has 2 divisors, whose sum is σ = 38129000. Its totient is φ = 38128998.

The previous prime is 38128973. The next prime is 38129017. The reversal of 38128999 is 99982183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38128999 - 2⁵ = 38128967 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 (38128919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19064499 + 19064500.

It is an arithmetic number, because the mean of its divisors is an integer number (19064500).

Almost surely, 2^38128999 is an apocalyptic number.

38128999 is a deficient number, since it is larger than the sum of its proper divisors (1).

38128999 is an equidigital number, since it uses as much as digits as its factorization.

38128999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 38128999 is about 6174.8683386774. The cubic root of 38128999 is about 336.5775421155.

The spelling of 38128999 in words is "thirty-eight million, one hundred twenty-eight thousand, nine hundred ninety-nine".