623951 has 8 divisors (see below), whose sum is σ = 668160. Its totient is φ = 582624.

The previous prime is 623947. The next prime is 623957. The reversal of 623951 is 159326.

623951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 623951 - 2² = 623947 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 623951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4850 + ... + 4976.

It is an arithmetic number, because the mean of its divisors is an integer number (83520).

2⁶²³⁹⁵¹ is an apocalyptic number.

623951 is a deficient number, since it is larger than the sum of its proper divisors (44209).

623951 is an equidigital number, since it uses as much as digits as its factorization.

623951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 144 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 623951 is about 789.9056905732. The cubic root of 623951 is about 85.4509368203.

The spelling of 623951 in words is "six hundred twenty-three thousand, nine hundred fifty-one".