623457 has 20 divisors (see below), whose sum is σ = 958320. Its totient is φ = 403704.

The previous prime is 623437. The next prime is 623477. The reversal of 623457 is 754326.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (623437) and next prime (623477).

It is not a de Polignac number, because 623457 - 2⁶ = 623393 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 6⁴ + 2¹⁹ + 4² + 3⁹ + 5⁷ + 7² .

It is a self number, because there is not a number n which added to its sum of digits gives 623457.

It is not an unprimeable number, because it can be changed into a prime (623417) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3394 + ... + 3572.

It is an arithmetic number, because the mean of its divisors is an integer number (47916).

2⁶²³⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

623457 is a deficient number, since it is larger than the sum of its proper divisors (334863).

623457 is a wasteful number, since it uses less digits than its factorization.

623457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 225 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 623457 is about 789.5929330991. The cubic root of 623457 is about 85.4283795426.

The spelling of 623457 in words is "six hundred twenty-three thousand, four hundred fifty-seven".