2990621873 has 2 divisors, whose sum is σ = 2990621874. Its totient is φ = 2990621872.

The previous prime is 2990621819. The next prime is 2990621899. The reversal of 2990621873 is 3781260992.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2401686049 + 588935824 = 49007^2 + 24268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2990621873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2990621813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495310936 + 1495310937.

It is an arithmetic number, because the mean of its divisors is an integer number (1495310937).

Almost surely, 2^2990621873 is an apocalyptic number.

It is an amenable number.

2990621873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2990621873 is an equidigital number, since it uses as much as digits as its factorization.

2990621873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 2990621873 is about 54686.5785453799. The cubic root of 2990621873 is about 1440.7451571930.

The spelling of 2990621873 in words is "two billion, nine hundred ninety million, six hundred twenty-one thousand, eight hundred seventy-three".