290920243 has 2 divisors, whose sum is σ = 290920244. Its totient is φ = 290920242.

The previous prime is 290920211. The next prime is 290920247. The reversal of 290920243 is 342029092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290920243 - 2⁵ = 290920211 is a prime.

It is not a weakly prime, because it can be changed into another prime (290920247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145460121 + 145460122.

It is an arithmetic number, because the mean of its divisors is an integer number (145460122).

Almost surely, 2^290920243 is an apocalyptic number.

290920243 is a deficient number, since it is larger than the sum of its proper divisors (1).

290920243 is an equidigital number, since it uses as much as digits as its factorization.

290920243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 290920243 is about 17056.3842299592. The cubic root of 290920243 is about 662.6099918479.

The spelling of 290920243 in words is "two hundred ninety million, nine hundred twenty thousand, two hundred forty-three".