31383967 has 2 divisors, whose sum is σ = 31383968. Its totient is φ = 31383966.

The previous prime is 31383931. The next prime is 31383973. The reversal of 31383967 is 76938313.

It is a strong prime.

It is an emirp because it is prime and its reverse (76938313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31383967 - 2²³ = 22995359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31383907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15691983 + 15691984.

It is an arithmetic number, because the mean of its divisors is an integer number (15691984).

Almost surely, 2^31383967 is an apocalyptic number.

31383967 is a deficient number, since it is larger than the sum of its proper divisors (1).

31383967 is an equidigital number, since it uses as much as digits as its factorization.

31383967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 31383967 is about 5602.1395020117. The cubic root of 31383967 is about 315.4297217308.

The spelling of 31383967 in words is "thirty-one million, three hundred eighty-three thousand, nine hundred sixty-seven".