290813747261 has 2 divisors, whose sum is σ = 290813747262. Its totient is φ = 290813747260.

The previous prime is 290813747249. The next prime is 290813747267. The reversal of 290813747261 is 162747318092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243424811161 + 47388936100 = 493381^2 + 217690^2 .

It is a cyclic number.

It is not a de Polignac number, because 290813747261 - 2⁶ = 290813747197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290813747267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145406873630 + 145406873631.

It is an arithmetic number, because the mean of its divisors is an integer number (145406873631).

Almost surely, 2^290813747261 is an apocalyptic number.

It is an amenable number.

290813747261 is a deficient number, since it is larger than the sum of its proper divisors (1).

290813747261 is an equidigital number, since it uses as much as digits as its factorization.

290813747261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 290813747261 in words is "two hundred ninety billion, eight hundred thirteen million, seven hundred forty-seven thousand, two hundred sixty-one".