109631 has 4 divisors (see below), whose sum is σ = 112632. Its totient is φ = 106632.

The previous prime is 109621. The next prime is 109639. The reversal of 109631 is 136901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136901 = 17 ⋅8053.

It is a cyclic number.

It is not a de Polignac number, because 109631 - 2⁶ = 109567 is a prime.

It is a super-2 number, since 2×109631² = 24037912322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (28158).

2¹⁰⁹⁶³¹ is an apocalyptic number.

109631 is a deficient number, since it is larger than the sum of its proper divisors (3001).

109631 is an equidigital number, since it uses as much as digits as its factorization.

109631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 109631 is about 331.1057232970. The cubic root of 109631 is about 47.8605617645.

The spelling of 109631 in words is "one hundred nine thousand, six hundred thirty-one".