1913325731 has 2 divisors, whose sum is σ = 1913325732. Its totient is φ = 1913325730.

The previous prime is 1913325709. The next prime is 1913325761. The reversal of 1913325731 is 1375233191.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913325731 is a prime.

It is a super-2 number, since 2×1913325731² = 7321630705813368722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1913325691 and 1913325700.

It is not a weakly prime, because it can be changed into another prime (1913325761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956662865 + 956662866.

It is an arithmetic number, because the mean of its divisors is an integer number (956662866).

Almost surely, 2^1913325731 is an apocalyptic number.

1913325731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913325731 is an equidigital number, since it uses as much as digits as its factorization.

1913325731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 35.

The square root of 1913325731 is about 43741.5789724148. The cubic root of 1913325731 is about 1241.4511563831.

The spelling of 1913325731 in words is "one billion, nine hundred thirteen million, three hundred twenty-five thousand, seven hundred thirty-one".