290363813 has 2 divisors, whose sum is σ = 290363814. Its totient is φ = 290363812.

The previous prime is 290363809. The next prime is 290363861. The reversal of 290363813 is 318363092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281501284 + 8862529 = 16778^2 + 2977^2 .

It is a cyclic number.

It is not a de Polignac number, because 290363813 - 2² = 290363809 is a prime.

It is a super-2 number, since 2×290363813² = 168622287799797938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290363113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145181906 + 145181907.

It is an arithmetic number, because the mean of its divisors is an integer number (145181907).

Almost surely, 2^290363813 is an apocalyptic number.

It is an amenable number.

290363813 is a deficient number, since it is larger than the sum of its proper divisors (1).

290363813 is an equidigital number, since it uses as much as digits as its factorization.

290363813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 290363813 is about 17040.0649353223. The cubic root of 290363813 is about 662.1872741678.

The spelling of 290363813 in words is "two hundred ninety million, three hundred sixty-three thousand, eight hundred thirteen".