290118110981 has 2 divisors, whose sum is σ = 290118110982. Its totient is φ = 290118110980.

The previous prime is 290118110969. The next prime is 290118110983. The reversal of 290118110981 is 189011811092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283273030756 + 6845080225 = 532234^2 + 82735^2 .

It is a cyclic number.

It is not a de Polignac number, because 290118110981 - 2⁶ = 290118110917 is a prime.

It is a super-2 number, since 2×290118110981² (a number of 24 digits) contains 22 as substring.

Together with 290118110983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290118110983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145059055490 + 145059055491.

It is an arithmetic number, because the mean of its divisors is an integer number (145059055491).

Almost surely, 2^290118110981 is an apocalyptic number.

It is an amenable number.

290118110981 is a deficient number, since it is larger than the sum of its proper divisors (1).

290118110981 is an equidigital number, since it uses as much as digits as its factorization.

290118110981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 41.

The spelling of 290118110981 in words is "two hundred ninety billion, one hundred eighteen million, one hundred ten thousand, nine hundred eighty-one".