191413663979 has 2 divisors, whose sum is σ = 191413663980. Its totient is φ = 191413663978.

The previous prime is 191413663967. The next prime is 191413663999. The reversal of 191413663979 is 979366314191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191413663979 - 2⁴ = 191413663963 is a prime.

It is a super-2 number, since 2×191413663979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191413663949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95706831989 + 95706831990.

It is an arithmetic number, because the mean of its divisors is an integer number (95706831990).

Almost surely, 2^191413663979 is an apocalyptic number.

191413663979 is a deficient number, since it is larger than the sum of its proper divisors (1).

191413663979 is an equidigital number, since it uses as much as digits as its factorization.

191413663979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6613488, while the sum is 59.

The spelling of 191413663979 in words is "one hundred ninety-one billion, four hundred thirteen million, six hundred sixty-three thousand, nine hundred seventy-nine".