627431 has 4 divisors (see below), whose sum is σ = 717072. Its totient is φ = 537792.

The previous prime is 627391. The next prime is 627433. The reversal of 627431 is 134726.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-627431 is a prime.

It is a super-2 number, since 2×627431² = 787339319522, 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 = 627397 and 627406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (627433) 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, 44810 + ... + 44823.

It is an arithmetic number, because the mean of its divisors is an integer number (179268).

2⁶²⁷⁴³¹ is an apocalyptic number.

627431 is a deficient number, since it is larger than the sum of its proper divisors (89641).

627431 is an equidigital number, since it uses as much as digits as its factorization.

627431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89640.

The product of its digits is 1008, while the sum is 23.

The square root of 627431 is about 792.1054222766. The cubic root of 627431 is about 85.6095059609.

The spelling of 627431 in words is "six hundred twenty-seven thousand, four hundred thirty-one".