2190912979 has 2 divisors, whose sum is σ = 2190912980. Its totient is φ = 2190912978.

The previous prime is 2190912947. The next prime is 2190913007. The reversal of 2190912979 is 9792190912.

It is a happy number.

2190912979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2190912979 - 2⁵ = 2190912947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2190912929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095456489 + 1095456490.

It is an arithmetic number, because the mean of its divisors is an integer number (1095456490).

Almost surely, 2^2190912979 is an apocalyptic number.

2190912979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190912979 is an equidigital number, since it uses as much as digits as its factorization.

2190912979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 49.

The square root of 2190912979 is about 46807.1893943655. The cubic root of 2190912979 is about 1298.7982936395.

The spelling of 2190912979 in words is "two billion, one hundred ninety million, nine hundred twelve thousand, nine hundred seventy-nine".