1113721931 has 6 divisors (see below), whose sum is σ = 1295554140. Its totient is φ = 954618756.

The previous prime is 1113721919. The next prime is 1113721951. The reversal of 1113721931 is 1391273111.

It is a de Polignac number, because none of the positive numbers 2^k-1113721931 is a prime.

It is a super-2 number, since 2×1113721931² = 2480753079180737522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113721894 and 1113721903.

It is not an unprimeable number, because it can be changed into a prime (1113721951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11364461 + ... + 11364558.

It is an arithmetic number, because the mean of its divisors is an integer number (215925690).

Almost surely, 2^1113721931 is an apocalyptic number.

1113721931 is a deficient number, since it is larger than the sum of its proper divisors (181832209).

1113721931 is an equidigital number, since it uses as much as digits as its factorization.

1113721931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22729033 (or 22729026 counting only the distinct ones).

The product of its digits is 1134, while the sum is 29.

The square root of 1113721931 is about 33372.4726533711. The cubic root of 1113721931 is about 1036.5547765197.

The spelling of 1113721931 in words is "one billion, one hundred thirteen million, seven hundred twenty-one thousand, nine hundred thirty-one".