31636994 has 8 divisors (see below), whose sum is σ = 48613068. Its totient is φ = 15432640.

The previous prime is 31636993. The next prime is 31637041. The reversal of 31636994 is 49963613.

It can be written as a sum of positive squares in 2 ways, for example, as 24373969 + 7263025 = 4937^2 + 2695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (31636991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192827 + ... + 192990.

Almost surely, 2^31636994 is an apocalyptic number.

31636994 is a deficient number, since it is larger than the sum of its proper divisors (16976074).

31636994 is a wasteful number, since it uses less digits than its factorization.

31636994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385860.

The product of its digits is 104976, while the sum is 41.

The square root of 31636994 is about 5624.6772351843. The cubic root of 31636994 is about 316.2751502441.

Adding to 31636994 its sum of digits (41), we get a triangular number (31637035 = T₇₉₅₄).

The spelling of 31636994 in words is "thirty-one million, six hundred thirty-six thousand, nine hundred ninety-four".