290532391 has 2 divisors, whose sum is σ = 290532392. Its totient is φ = 290532390.

The previous prime is 290532383. The next prime is 290532413. The reversal of 290532391 is 193235092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290532391 - 2³ = 290532383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290532791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145266195 + 145266196.

It is an arithmetic number, because the mean of its divisors is an integer number (145266196).

Almost surely, 2^290532391 is an apocalyptic number.

290532391 is a deficient number, since it is larger than the sum of its proper divisors (1).

290532391 is an equidigital number, since it uses as much as digits as its factorization.

290532391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 290532391 is about 17045.0107362829. The cubic root of 290532391 is about 662.3153991901.

The spelling of 290532391 in words is "two hundred ninety million, five hundred thirty-two thousand, three hundred ninety-one".