623755 has 12 divisors (see below), whose sum is σ = 823536. Its totient is φ = 453200.

The previous prime is 623743. The next prime is 623759. The reversal of 623755 is 557326.

623755 = T₄₉₇ + T₄₉₈ + ... + T₅₀₁.

It is not a de Polignac number, because 623755 - 2⁵ = 623723 is a prime.

It is a Duffinian number.

623755 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (623759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90 + ... + 1120.

It is an arithmetic number, because the mean of its divisors is an integer number (68628).

2⁶²³⁷⁵⁵ is an apocalyptic number.

623755 is a deficient number, since it is larger than the sum of its proper divisors (199781).

623755 is a wasteful number, since it uses less digits than its factorization.

623755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1047 counting only the distinct ones).

The product of its digits is 6300, while the sum is 28.

The square root of 623755 is about 789.7816153849. The cubic root of 623755 is about 85.4419883946.

It can be divided in two parts, 623 and 755, that added together give a triangular number (1378 = T₅₂).

The spelling of 623755 in words is "six hundred twenty-three thousand, seven hundred fifty-five".