290042331 has 4 divisors (see below), whose sum is σ = 386723112. Its totient is φ = 193361552.

The previous prime is 290042327. The next prime is 290042377. The reversal of 290042331 is 133240092.

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 290042331 - 2² = 290042327 is a prime.

It is a super-2 number, since 2×290042331² = 168249107543827122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (290042381) 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, 48340386 + ... + 48340391.

It is an arithmetic number, because the mean of its divisors is an integer number (96680778).

Almost surely, 2^290042331 is an apocalyptic number.

290042331 is a deficient number, since it is larger than the sum of its proper divisors (96680781).

290042331 is an equidigital number, since it uses as much as digits as its factorization.

290042331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96680780.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 290042331 is about 17030.6292015298. The cubic root of 290042331 is about 661.9427993706.

The spelling of 290042331 in words is "two hundred ninety million, forty-two thousand, three hundred thirty-one".