290240311 has 2 divisors, whose sum is σ = 290240312. Its totient is φ = 290240310.

The previous prime is 290240309. The next prime is 290240317. The reversal of 290240311 is 113042092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290240311 - 2¹ = 290240309 is a prime.

Together with 290240309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290240317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145120155 + 145120156.

It is an arithmetic number, because the mean of its divisors is an integer number (145120156).

Almost surely, 2^290240311 is an apocalyptic number.

290240311 is a deficient number, since it is larger than the sum of its proper divisors (1).

290240311 is an equidigital number, since it uses as much as digits as its factorization.

290240311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 290240311 is about 17036.4406787333. The cubic root of 290240311 is about 662.0933769641.

The spelling of 290240311 in words is "two hundred ninety million, two hundred forty thousand, three hundred eleven".