1979190113 has 2 divisors, whose sum is σ = 1979190114. Its totient is φ = 1979190112.

The previous prime is 1979190097. The next prime is 1979190131. The reversal of 1979190113 is 3110919791.

Together with next prime (1979190131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1711311424 + 267878689 = 41368^2 + 16367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979190113 - 2⁴ = 1979190097 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 (1979190193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989595056 + 989595057.

It is an arithmetic number, because the mean of its divisors is an integer number (989595057).

Almost surely, 2^1979190113 is an apocalyptic number.

It is an amenable number.

1979190113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979190113 is an equidigital number, since it uses as much as digits as its factorization.

1979190113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 41.

The square root of 1979190113 is about 44488.0895633876. The cubic root of 1979190113 is about 1255.5360033783.

The spelling of 1979190113 in words is "one billion, nine hundred seventy-nine million, one hundred ninety thousand, one hundred thirteen".