1381075931 has 2 divisors, whose sum is σ = 1381075932. Its totient is φ = 1381075930.

The previous prime is 1381075907. The next prime is 1381075951. The reversal of 1381075931 is 1395701831.

It is a strong prime.

It is an emirp because it is prime and its reverse (1395701831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381075931 - 2³⁰ = 307334107 is a prime.

It is a super-2 number, since 2×1381075931² = 3814741454375033522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1381075951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690537965 + 690537966.

It is an arithmetic number, because the mean of its divisors is an integer number (690537966).

Almost surely, 2^1381075931 is an apocalyptic number.

1381075931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381075931 is an equidigital number, since it uses as much as digits as its factorization.

1381075931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1381075931 is about 37162.8299648991. The cubic root of 1381075931 is about 1113.6255476664.

The spelling of 1381075931 in words is "one billion, three hundred eighty-one million, seventy-five thousand, nine hundred thirty-one".