906631 has 4 divisors (see below), whose sum is σ = 989064. Its totient is φ = 824200.

The previous prime is 906617. The next prime is 906641. The reversal of 906631 is 136609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 906631 - 2⁹ = 906119 is a prime.

It is a super-2 number, since 2×906631² = 1643959540322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 906596 and 906605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906601) 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, 41200 + ... + 41221.

It is an arithmetic number, because the mean of its divisors is an integer number (247266).

2⁹⁰⁶⁶³¹ is an apocalyptic number.

906631 is a deficient number, since it is larger than the sum of its proper divisors (82433).

906631 is a wasteful number, since it uses less digits than its factorization.

906631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82432.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 906631 is about 952.1717282087. The cubic root of 906631 is about 96.7854755318.

The spelling of 906631 in words is "nine hundred six thousand, six hundred thirty-one".