31393127 has 2 divisors, whose sum is σ = 31393128. Its totient is φ = 31393126.

The previous prime is 31393121. The next prime is 31393129. The reversal of 31393127 is 72139313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31393127 - 2⁸ = 31392871 is a prime.

Together with 31393129, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1938710 and since 31393127 and 1938710 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31393127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31393121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15696563 + 15696564.

It is an arithmetic number, because the mean of its divisors is an integer number (15696564).

Almost surely, 2^31393127 is an apocalyptic number.

31393127 is a deficient number, since it is larger than the sum of its proper divisors (1).

31393127 is an equidigital number, since it uses as much as digits as its factorization.

31393127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 29.

The square root of 31393127 is about 5602.9569871631. The cubic root of 31393127 is about 315.4604067745.

The spelling of 31393127 in words is "thirty-one million, three hundred ninety-three thousand, one hundred twenty-seven".