31677479 has 2 divisors, whose sum is σ = 31677480. Its totient is φ = 31677478.

The previous prime is 31677473. The next prime is 31677487. The reversal of 31677479 is 97477613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31677479 - 2⁸ = 31677223 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31677473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15838739 + 15838740.

It is an arithmetic number, because the mean of its divisors is an integer number (15838740).

Almost surely, 2^31677479 is an apocalyptic number.

31677479 is a deficient number, since it is larger than the sum of its proper divisors (1).

31677479 is an equidigital number, since it uses as much as digits as its factorization.

31677479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 44.

The square root of 31677479 is about 5628.2749577468. The cubic root of 31677479 is about 316.4100023049.

The spelling of 31677479 in words is "thirty-one million, six hundred seventy-seven thousand, four hundred seventy-nine".