10720631 has 4 divisors (see below), whose sum is σ = 10969992. Its totient is φ = 10471272.

The previous prime is 10720627. The next prime is 10720663. The reversal of 10720631 is 13602701.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13602701 = 7 ⋅1943243.

It is a cyclic number.

It is not a de Polignac number, because 10720631 - 2² = 10720627 is a prime.

It is a super-2 number, since 2×10720631² = 229863858076322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10720601) 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, 124616 + ... + 124701.

It is an arithmetic number, because the mean of its divisors is an integer number (2742498).

Almost surely, 2^10720631 is an apocalyptic number.

10720631 is a deficient number, since it is larger than the sum of its proper divisors (249361).

10720631 is an equidigital number, since it uses as much as digits as its factorization.

10720631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249360.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 10720631 is about 3274.2374684803. The cubic root of 10720631 is about 220.4990804548.

The spelling of 10720631 in words is "ten million, seven hundred twenty thousand, six hundred thirty-one".