1185797979 has 12 divisors (see below), whose sum is σ = 1734501600. Its totient is φ = 780524784.

The previous prime is 1185797947. The next prime is 1185797981. The reversal of 1185797979 is 9797975811.

It is not a de Polignac number, because 1185797979 - 2⁵ = 1185797947 is a prime.

It is a super-2 number, since 2×1185797979² = 2812233694000968882, which contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

1185797979 is a modest number, since divided by 797979 gives 1185 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1185797929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833184 + ... + 834605.

It is an arithmetic number, because the mean of its divisors is an integer number (144541800).

Almost surely, 2^1185797979 is an apocalyptic number.

1185797979 is a deficient number, since it is larger than the sum of its proper divisors (548703621).

1185797979 is a wasteful number, since it uses less digits than its factorization.

1185797979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667874 (or 1667871 counting only the distinct ones).

The product of its digits is 10001880, while the sum is 63.

The square root of 1185797979 is about 34435.4175087220. The cubic root of 1185797979 is about 1058.4497270931.

The spelling of 1185797979 in words is "one billion, one hundred eighty-five million, seven hundred ninety-seven thousand, nine hundred seventy-nine".