623617025 has 12 divisors (see below), whose sum is σ = 776085372. Its totient is φ = 497087040.

The previous prime is 623617021. The next prime is 623617061. The reversal of 623617025 is 520716326.

It can be written as a sum of positive squares in 6 ways, for example, as 59459521 + 564157504 = 7711^2 + 23752^2 .

It is not a de Polignac number, because 623617025 - 2² = 623617021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623616982 and 623617000.

It is not an unprimeable number, because it can be changed into a prime (623617021) 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 11 ways as a sum of consecutive naturals, for example, 38102 + ... + 51951.

It is an arithmetic number, because the mean of its divisors is an integer number (64673781).

Almost surely, 2^623617025 is an apocalyptic number.

It is an amenable number.

623617025 is a deficient number, since it is larger than the sum of its proper divisors (152468347).

623617025 is a wasteful number, since it uses less digits than its factorization.

623617025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90340 (or 90335 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 623617025 is about 24972.3251820891. The cubic root of 623617025 is about 854.3568798938.

The spelling of 623617025 in words is "six hundred twenty-three million, six hundred seventeen thousand, twenty-five".