290423863 has 2 divisors, whose sum is σ = 290423864. Its totient is φ = 290423862.

The previous prime is 290423839. The next prime is 290423933. The reversal of 290423863 is 368324092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290423863 - 2⁵ = 290423831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290423803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145211931 + 145211932.

It is an arithmetic number, because the mean of its divisors is an integer number (145211932).

Almost surely, 2^290423863 is an apocalyptic number.

290423863 is a deficient number, since it is larger than the sum of its proper divisors (1).

290423863 is an equidigital number, since it uses as much as digits as its factorization.

290423863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 290423863 is about 17041.8268680327. The cubic root of 290423863 is about 662.2329198981.

The spelling of 290423863 in words is "two hundred ninety million, four hundred twenty-three thousand, eight hundred sixty-three".