290979047921 has 2 divisors, whose sum is σ = 290979047922. Its totient is φ = 290979047920.

The previous prime is 290979047899. The next prime is 290979047951. The reversal of 290979047921 is 129740979092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240394090000 + 50584957921 = 490300^2 + 224911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-290979047921 is a prime.

It is a super-2 number, since 2×290979047921² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (290979047951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145489523960 + 145489523961.

It is an arithmetic number, because the mean of its divisors is an integer number (145489523961).

Almost surely, 2^290979047921 is an apocalyptic number.

It is an amenable number.

290979047921 is a deficient number, since it is larger than the sum of its proper divisors (1).

290979047921 is an equidigital number, since it uses as much as digits as its factorization.

290979047921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The spelling of 290979047921 in words is "two hundred ninety billion, nine hundred seventy-nine million, forty-seven thousand, nine hundred twenty-one".