623425649 has 32 divisors (see below), whose sum is σ = 858802176. Its totient is φ = 437310720.

The previous prime is 623425643. The next prime is 623425661. The reversal of 623425649 is 946524326.

It is not a de Polignac number, because 623425649 - 2⁸ = 623425393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623425643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19754 + ... + 40460.

It is an arithmetic number, because the mean of its divisors is an integer number (26837568).

Almost surely, 2^623425649 is an apocalyptic number.

It is an amenable number.

623425649 is a deficient number, since it is larger than the sum of its proper divisors (235376527).

623425649 is a wasteful number, since it uses less digits than its factorization.

623425649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20765.

The product of its digits is 311040, while the sum is 41.

The square root of 623425649 is about 24968.4931263382. The cubic root of 623425649 is about 854.2694757532.

The spelling of 623425649 in words is "six hundred twenty-three million, four hundred twenty-five thousand, six hundred forty-nine".