1178897994 has 12 divisors (see below), whose sum is σ = 2554279026. Its totient is φ = 392965992.

The previous prime is 1178897971. The next prime is 1178898001. The reversal of 1178897994 is 4997988711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1176833025 + 2064969 = 34305^2 + 1437^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32747149 + ... + 32747184.

Almost surely, 2^1178897994 is an apocalyptic number.

1178897994 is an abundant number, since it is smaller than the sum of its proper divisors (1375381032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1178897994 is a wasteful number, since it uses less digits than its factorization.

1178897994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65494341 (or 65494338 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 63.

The square root of 1178897994 is about 34335.0840103822. The cubic root of 1178897994 is about 1056.3927441083.

The spelling of 1178897994 in words is "one billion, one hundred seventy-eight million, eight hundred ninety-seven thousand, nine hundred ninety-four".