1316967978 has 32 divisors (see below), whose sum is σ = 2731180032. Its totient is φ = 422910000.

The previous prime is 1316967907. The next prime is 1316967983. The reversal of 1316967978 is 8797696131.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25603 + ... + 57353.

It is an arithmetic number, because the mean of its divisors is an integer number (85349376).

Almost surely, 2^1316967978 is an apocalyptic number.

1316967978 is an abundant number, since it is smaller than the sum of its proper divisors (1414212054).

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

1316967978 is a wasteful number, since it uses less digits than its factorization.

1316967978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32010.

The product of its digits is 3429216, while the sum is 57.

The square root of 1316967978 is about 36290.0534306578. The cubic root of 1316967978 is about 1096.1207648598.

The spelling of 1316967978 in words is "one billion, three hundred sixteen million, nine hundred sixty-seven thousand, nine hundred seventy-eight".