1318349961 has 12 divisors (see below), whose sum is σ = 1909260288. Its totient is φ = 876602904.

The previous prime is 1318349933. The next prime is 1318349971. The reversal of 1318349961 is 1699438131.

It is not a de Polignac number, because 1318349961 - 2⁶ = 1318349897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318349911) 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, 187785 + ... + 194678.

It is an arithmetic number, because the mean of its divisors is an integer number (159105024).

Almost surely, 2^1318349961 is an apocalyptic number.

It is an amenable number.

1318349961 is a deficient number, since it is larger than the sum of its proper divisors (590910327).

1318349961 is a wasteful number, since it uses less digits than its factorization.

1318349961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382852 (or 382849 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1318349961 is about 36309.0892339645. The cubic root of 1318349961 is about 1096.5040418844.

The spelling of 1318349961 in words is "one billion, three hundred eighteen million, three hundred forty-nine thousand, nine hundred sixty-one".