290920247 has 2 divisors, whose sum is σ = 290920248. Its totient is φ = 290920246.

The previous prime is 290920243. The next prime is 290920291. The reversal of 290920247 is 742029092.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290920247 - 2² = 290920243 is a prime.

It is a super-2 number, since 2×290920247² = 169269180229082018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290920243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145460123 + 145460124.

It is an arithmetic number, because the mean of its divisors is an integer number (145460124).

Almost surely, 2^290920247 is an apocalyptic number.

290920247 is a deficient number, since it is larger than the sum of its proper divisors (1).

290920247 is an equidigital number, since it uses as much as digits as its factorization.

290920247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 290920247 is about 17056.3843472173. The cubic root of 290920247 is about 662.6099948848.

The spelling of 290920247 in words is "two hundred ninety million, nine hundred twenty thousand, two hundred forty-seven".