31386634 has 4 divisors (see below), whose sum is σ = 47079954. Its totient is φ = 15693316.

The previous prime is 31386629. The next prime is 31386661. The reversal of 31386634 is 43668313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43668313 = 13 ⋅3359101.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 11539609 = 4455^2 + 3397^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31386634.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7846657 + ... + 7846660.

Almost surely, 2^31386634 is an apocalyptic number.

31386634 is a deficient number, since it is larger than the sum of its proper divisors (15693320).

31386634 is a wasteful number, since it uses less digits than its factorization.

31386634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15693319.

The product of its digits is 31104, while the sum is 34.

The square root of 31386634 is about 5602.3775310131. The cubic root of 31386634 is about 315.4386565184.

The spelling of 31386634 in words is "thirty-one million, three hundred eighty-six thousand, six hundred thirty-four".