290809049 has 2 divisors, whose sum is σ = 290809050. Its totient is φ = 290809048.

The previous prime is 290809037. The next prime is 290809073. The reversal of 290809049 is 940908092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167443600 + 123365449 = 12940^2 + 11107^2 .

It is a cyclic number.

It is not a de Polignac number, because 290809049 - 2²⁰ = 289760473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 290808997 and 290809015.

It is not a weakly prime, because it can be changed into another prime (290809549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145404524 + 145404525.

It is an arithmetic number, because the mean of its divisors is an integer number (145404525).

Almost surely, 2^290809049 is an apocalyptic number.

It is an amenable number.

290809049 is a deficient number, since it is larger than the sum of its proper divisors (1).

290809049 is an equidigital number, since it uses as much as digits as its factorization.

290809049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 290809049 is about 17053.1243178486. The cubic root of 290809049 is about 662.5255613254.

The spelling of 290809049 in words is "two hundred ninety million, eight hundred nine thousand, forty-nine".