38490139 has 2 divisors, whose sum is σ = 38490140. Its totient is φ = 38490138.

The previous prime is 38490131. The next prime is 38490149. The reversal of 38490139 is 93109483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38490139 - 2³ = 38490131 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38490098 and 38490107.

It is not a weakly prime, because it can be changed into another prime (38490131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19245069 + 19245070.

It is an arithmetic number, because the mean of its divisors is an integer number (19245070).

Almost surely, 2^38490139 is an apocalyptic number.

38490139 is a deficient number, since it is larger than the sum of its proper divisors (1).

38490139 is an equidigital number, since it uses as much as digits as its factorization.

38490139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 38490139 is about 6204.0421500825. The cubic root of 38490139 is about 337.6368396182.

The spelling of 38490139 in words is "thirty-eight million, four hundred ninety thousand, one hundred thirty-nine".