290921311969 has 2 divisors, whose sum is σ = 290921311970. Its totient is φ = 290921311968.

The previous prime is 290921311913. The next prime is 290921311979. The reversal of 290921311969 is 969113129092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174776671969 + 116144640000 = 418063^2 + 340800^2 .

It is a cyclic number.

It is not a de Polignac number, because 290921311969 - 2²⁹ = 290384441057 is a prime.

It is a super-2 number, since 2×290921311969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (290921311979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145460655984 + 145460655985.

It is an arithmetic number, because the mean of its divisors is an integer number (145460655985).

Almost surely, 2^290921311969 is an apocalyptic number.

It is an amenable number.

290921311969 is a deficient number, since it is larger than the sum of its proper divisors (1).

290921311969 is an equidigital number, since it uses as much as digits as its factorization.

290921311969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 290921311969 in words is "two hundred ninety billion, nine hundred twenty-one million, three hundred eleven thousand, nine hundred sixty-nine".