940631 has 4 divisors (see below), whose sum is σ = 981552. Its totient is φ = 899712.

The previous prime is 940619. The next prime is 940649. The reversal of 940631 is 136049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136049 = 37 ⋅3677.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940631 is a prime.

It is a super-3 number, since 3×940631³ = 2496773333595778773, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 40897 = 940631 / (9 + 4 + 0 + 6 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 940597 and 940606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940691) 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, 20426 + ... + 20471.

It is an arithmetic number, because the mean of its divisors is an integer number (245388).

2⁹⁴⁰⁶³¹ is an apocalyptic number.

940631 is a deficient number, since it is larger than the sum of its proper divisors (40921).

940631 is a wasteful number, since it uses less digits than its factorization.

940631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40920.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 940631 is about 969.8613302942. The cubic root of 940631 is about 97.9805250764.

The spelling of 940631 in words is "nine hundred forty thousand, six hundred thirty-one".