31629113 has 4 divisors (see below), whose sum is σ = 31646208. Its totient is φ = 31612020.

The previous prime is 31629109. The next prime is 31629127. The reversal of 31629113 is 31192613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31192613 = 809 ⋅38557.

It is a cyclic number.

It is not a de Polignac number, because 31629113 - 2² = 31629109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31629173) 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, 5381 + ... + 9602.

It is an arithmetic number, because the mean of its divisors is an integer number (7911552).

Almost surely, 2^31629113 is an apocalyptic number.

It is an amenable number.

31629113 is a deficient number, since it is larger than the sum of its proper divisors (17095).

31629113 is a wasteful number, since it uses less digits than its factorization.

31629113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17094.

The product of its digits is 972, while the sum is 26.

The square root of 31629113 is about 5623.9766180168. The cubic root of 31629113 is about 316.2488859340.

The spelling of 31629113 in words is "thirty-one million, six hundred twenty-nine thousand, one hundred thirteen".