7931995427 has 2 divisors, whose sum is σ = 7931995428. Its totient is φ = 7931995426.

The previous prime is 7931995367. The next prime is 7931995433. The reversal of 7931995427 is 7245991397.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7931995427 - 2⁶ = 7931995363 is a prime.

It is not a weakly prime, because it can be changed into another prime (7931995447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3965997713 + 3965997714.

It is an arithmetic number, because the mean of its divisors is an integer number (3965997714).

Almost surely, 2^7931995427 is an apocalyptic number.

7931995427 is a deficient number, since it is larger than the sum of its proper divisors (1).

7931995427 is an equidigital number, since it uses as much as digits as its factorization.

7931995427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 56.

The square root of 7931995427 is about 89061.7506396545. The cubic root of 7931995427 is about 1994.3168182693.

The spelling of 7931995427 in words is "seven billion, nine hundred thirty-one million, nine hundred ninety-five thousand, four hundred twenty-seven".