615923 has 16 divisors (see below), whose sum is σ = 810240. Its totient is φ = 453600.

The previous prime is 615919. The next prime is 615941. The reversal of 615923 is 329516.

It is not a de Polignac number, because 615923 - 2² = 615919 is a prime.

It is a super-2 number, since 2×615923² = 758722283858, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 615892 and 615901.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 615923.

It is not an unprimeable number, because it can be changed into a prime (615623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (50640).

2⁶¹⁵⁹²³ is an apocalyptic number.

615923 is a deficient number, since it is larger than the sum of its proper divisors (194317).

615923 is a wasteful number, since it uses less digits than its factorization.

615923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458.

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

The square root of 615923 is about 784.8076197387. The cubic root of 615923 is about 85.0828718872.

It can be divided in two parts, 615 and 923, that multiplied together give a triangular number (567645 = T₁₀₆₅).

The spelling of 615923 in words is "six hundred fifteen thousand, nine hundred twenty-three".