1313777892 has 48 divisors (see below), whose sum is σ = 3616428032. Its totient is φ = 363255840.

The previous prime is 1313777891. The next prime is 1313777897. The reversal of 1313777892 is 2987773131.

It is not an unprimeable number, because it can be changed into a prime (1313777891) 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, 249658 + ... + 254865.

Almost surely, 2^1313777892 is an apocalyptic number.

1313777892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1313777892 is an abundant number, since it is smaller than the sum of its proper divisors (2302650140).

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

1313777892 is a wasteful number, since it uses less digits than its factorization.

1313777892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504568 (or 504566 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 1313777892 is about 36246.0741598314. The cubic root of 1313777892 is about 1095.2350063769.

The spelling of 1313777892 in words is "one billion, three hundred thirteen million, seven hundred seventy-seven thousand, eight hundred ninety-two".