2990172893 has 2 divisors, whose sum is σ = 2990172894. Its totient is φ = 2990172892.

The previous prime is 2990172883. The next prime is 2990172901. The reversal of 2990172893 is 3982710992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2177808889 + 812364004 = 46667^2 + 28502^2 .

It is a cyclic number.

It is not a de Polignac number, because 2990172893 - 2⁴ = 2990172877 is a prime.

It is a super-2 number, since 2×2990172893² = 17882267860063978898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2990172883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495086446 + 1495086447.

It is an arithmetic number, because the mean of its divisors is an integer number (1495086447).

Almost surely, 2^2990172893 is an apocalyptic number.

It is an amenable number.

2990172893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2990172893 is an equidigital number, since it uses as much as digits as its factorization.

2990172893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 2990172893 is about 54682.4733621295. The cubic root of 2990172893 is about 1440.6730542256.

The spelling of 2990172893 in words is "two billion, nine hundred ninety million, one hundred seventy-two thousand, eight hundred ninety-three".