1931272939 has 2 divisors, whose sum is σ = 1931272940. Its totient is φ = 1931272938.

The previous prime is 1931272927. The next prime is 1931272963. The reversal of 1931272939 is 9392721391.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1931272939 - 2⁵ = 1931272907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1931272919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965636469 + 965636470.

It is an arithmetic number, because the mean of its divisors is an integer number (965636470).

Almost surely, 2^1931272939 is an apocalyptic number.

1931272939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931272939 is an equidigital number, since it uses as much as digits as its factorization.

1931272939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 1931272939 is about 43946.2505681657. The cubic root of 1931272939 is about 1245.3207324076.

The spelling of 1931272939 in words is "one billion, nine hundred thirty-one million, two hundred seventy-two thousand, nine hundred thirty-nine".