1201151979 has 12 divisors (see below), whose sum is σ = 1781889616. Its totient is φ = 779125392.

The previous prime is 1201151971. The next prime is 1201151993. The reversal of 1201151979 is 9791511021.

1201151979 is a `hidden beast` number, since 120 + 11 + 519 + 7 + 9 = 666.

It is not a de Polignac number, because 1201151979 - 2³ = 1201151971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201151971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1803199 + ... + 1803864.

Almost surely, 2^1201151979 is an apocalyptic number.

1201151979 is a deficient number, since it is larger than the sum of its proper divisors (580737637).

1201151979 is a wasteful number, since it uses less digits than its factorization.

1201151979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607106 (or 3607103 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 36.

The square root of 1201151979 is about 34657.6395474360. The cubic root of 1201151979 is about 1062.9985049716.

The spelling of 1201151979 in words is "one billion, two hundred one million, one hundred fifty-one thousand, nine hundred seventy-nine".