1913603831 has 6 divisors (see below), whose sum is σ = 1981866432. Its totient is φ = 1847616680.

The previous prime is 1913603821. The next prime is 1913603843. The reversal of 1913603831 is 1383063191.

It is not a de Polignac number, because 1913603831 - 2²² = 1909409527 is a prime.

It is a super-2 number, since 2×1913603831² = 7323759244035753122, 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 = 1913603791 and 1913603800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913603801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136855 + ... + 1138536.

It is an arithmetic number, because the mean of its divisors is an integer number (330311072).

Almost surely, 2^1913603831 is an apocalyptic number.

1913603831 is a deficient number, since it is larger than the sum of its proper divisors (68262601).

1913603831 is an equidigital number, since it uses as much as digits as its factorization.

1913603831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275449 (or 2275420 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1913603831 is about 43744.7577545013. The cubic root of 1913603831 is about 1241.5113013679.

The spelling of 1913603831 in words is "one billion, nine hundred thirteen million, six hundred three thousand, eight hundred thirty-one".