1319831961 has 16 divisors (see below), whose sum is σ = 2023987584. Its totient is φ = 749384064.

The previous prime is 1319831951. The next prime is 1319831969. The reversal of 1319831961 is 1691389131.

It is not a de Polignac number, because 1319831961 - 2⁹ = 1319831449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1319831969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196860 + ... + 203453.

It is an arithmetic number, because the mean of its divisors is an integer number (126499224).

Almost surely, 2^1319831961 is an apocalyptic number.

It is an amenable number.

1319831961 is a deficient number, since it is larger than the sum of its proper divisors (704155623).

1319831961 is a wasteful number, since it uses less digits than its factorization.

1319831961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400480.

The product of its digits is 34992, while the sum is 42.

The square root of 1319831961 is about 36329.4916149401. The cubic root of 1319831961 is about 1096.9147599552.

The spelling of 1319831961 in words is "one billion, three hundred nineteen million, eight hundred thirty-one thousand, nine hundred sixty-one".