1623085725 has 12 divisors (see below), whose sum is σ = 2683501856. Its totient is φ = 865645680.

The previous prime is 1623085691. The next prime is 1623085799. The reversal of 1623085725 is 5275803261.

1623085725 = 5673² + 5674² + ... + 5722².

It is not a de Polignac number, because 1623085725 - 2⁶ = 1623085661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10820497 + ... + 10820646.

Almost surely, 2^1623085725 is an apocalyptic number.

1623085725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1623085725 is a deficient number, since it is larger than the sum of its proper divisors (1060416131).

1623085725 is a wasteful number, since it uses less digits than its factorization.

1623085725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21641156 (or 21641151 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 1623085725 is about 40287.5380856165. The cubic root of 1623085725 is about 1175.2055110581.

Adding to 1623085725 its reverse (5275803261), we get a palindrome (6898888986).

The spelling of 1623085725 in words is "one billion, six hundred twenty-three million, eighty-five thousand, seven hundred twenty-five".