7920431 has 2 divisors, whose sum is σ = 7920432. Its totient is φ = 7920430.

The previous prime is 7920401. The next prime is 7920433. The reversal of 7920431 is 1340297.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7920431 - 2²² = 3726127 is a prime.

It is a super-2 number, since 2×7920431² = 125466454451522, which contains 22 as substring.

Together with 7920433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7920431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7920433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960215 + 3960216.

It is an arithmetic number, because the mean of its divisors is an integer number (3960216).

Almost surely, 2^7920431 is an apocalyptic number.

7920431 is a deficient number, since it is larger than the sum of its proper divisors (1).

7920431 is an equidigital number, since it uses as much as digits as its factorization.

7920431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 7920431 is about 2814.3260294429. The cubic root of 7920431 is about 199.3347144294.

The spelling of 7920431 in words is "seven million, nine hundred twenty thousand, four hundred thirty-one".