290790139 has 4 divisors (see below), whose sum is σ = 291182256. Its totient is φ = 290398024.

The previous prime is 290790133. The next prime is 290790179. The reversal of 290790139 is 931097092.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 290790139 - 2⁵ = 290790107 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290790133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194944 + ... + 196429.

It is an arithmetic number, because the mean of its divisors is an integer number (72795564).

Almost surely, 2^290790139 is an apocalyptic number.

290790139 is a deficient number, since it is larger than the sum of its proper divisors (392117).

290790139 is an equidigital number, since it uses as much as digits as its factorization.

290790139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392116.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 290790139 is about 17052.5698649793. The cubic root of 290790139 is about 662.5112006650.

The spelling of 290790139 in words is "two hundred ninety million, seven hundred ninety thousand, one hundred thirty-nine".