1380913931 has 2 divisors, whose sum is σ = 1380913932. Its totient is φ = 1380913930.

The previous prime is 1380913883. The next prime is 1380913957. The reversal of 1380913931 is 1393190831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1380913931 - 2²² = 1376719627 is a prime.

It is a super-2 number, since 2×1380913931² = 3813846569659745522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1380913991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690456965 + 690456966.

It is an arithmetic number, because the mean of its divisors is an integer number (690456966).

Almost surely, 2^1380913931 is an apocalyptic number.

1380913931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380913931 is an equidigital number, since it uses as much as digits as its factorization.

1380913931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1380913931 is about 37160.6503037824. The cubic root of 1380913931 is about 1113.5820032604.

The spelling of 1380913931 in words is "one billion, three hundred eighty million, nine hundred thirteen thousand, nine hundred thirty-one".