623525645 has 4 divisors (see below), whose sum is σ = 748230780. Its totient is φ = 498820512.

The previous prime is 623525569. The next prime is 623525647. The reversal of 623525645 is 546525326.

623525645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 433389124 + 190136521 = 20818^2 + 13789^2 .

It is a cyclic number.

It is not a de Polignac number, because 623525645 - 2¹⁶ = 623460109 is a prime.

It is a super-3 number, since 3×623525645³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 623525599 and 623525608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623525647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62352560 + ... + 62352569.

It is an arithmetic number, because the mean of its divisors is an integer number (187057695).

Almost surely, 2^623525645 is an apocalyptic number.

It is an amenable number.

623525645 is a deficient number, since it is larger than the sum of its proper divisors (124705135).

623525645 is a wasteful number, since it uses less digits than its factorization.

623525645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124705134.

The product of its digits is 216000, while the sum is 38.

The square root of 623525645 is about 24970.4954896774. The cubic root of 623525645 is about 854.3151475794.

The spelling of 623525645 in words is "six hundred twenty-three million, five hundred twenty-five thousand, six hundred forty-five".