290521139 has 2 divisors, whose sum is σ = 290521140. Its totient is φ = 290521138.

The previous prime is 290521081. The next prime is 290521169. The reversal of 290521139 is 931125092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290521139 - 2⁸ = 290520883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (290521169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145260569 + 145260570.

It is an arithmetic number, because the mean of its divisors is an integer number (145260570).

Almost surely, 2^290521139 is an apocalyptic number.

290521139 is a deficient number, since it is larger than the sum of its proper divisors (1).

290521139 is an equidigital number, since it uses as much as digits as its factorization.

290521139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 290521139 is about 17044.6806658265. The cubic root of 290521139 is about 662.3068488307.

The spelling of 290521139 in words is "two hundred ninety million, five hundred twenty-one thousand, one hundred thirty-nine".