1195011979 has 4 divisors (see below), whose sum is σ = 1365727984. Its totient is φ = 1024295976.

The previous prime is 1195011949. The next prime is 1195012001. The reversal of 1195011979 is 9791105911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1195011979 - 2¹⁵ = 1194979211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1195011919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85357992 + ... + 85358005.

It is an arithmetic number, because the mean of its divisors is an integer number (341431996).

Almost surely, 2^1195011979 is an apocalyptic number.

1195011979 is a deficient number, since it is larger than the sum of its proper divisors (170716005).

1195011979 is an equidigital number, since it uses as much as digits as its factorization.

1195011979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170716004.

The product of its (nonzero) digits is 25515, while the sum is 43.

The square root of 1195011979 is about 34568.9452977669. The cubic root of 1195011979 is about 1061.1841457044.

The spelling of 1195011979 in words is "one billion, one hundred ninety-five million, eleven thousand, nine hundred seventy-nine".