31419979 has 2 divisors, whose sum is σ = 31419980. Its totient is φ = 31419978.

The previous prime is 31419967. The next prime is 31420009. The reversal of 31419979 is 97991413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31419979 - 2⁹ = 31419467 is a prime.

It is not a weakly prime, because it can be changed into another prime (31411979) 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, 15709989 + 15709990.

It is an arithmetic number, because the mean of its divisors is an integer number (15709990).

Almost surely, 2^31419979 is an apocalyptic number.

31419979 is a deficient number, since it is larger than the sum of its proper divisors (1).

31419979 is an equidigital number, since it uses as much as digits as its factorization.

31419979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 31419979 is about 5605.3527096874. The cubic root of 31419979 is about 315.5503237899.

The spelling of 31419979 in words is "thirty-one million, four hundred nineteen thousand, nine hundred seventy-nine".