623507617 has 4 divisors (see below), whose sum is σ = 625474836. Its totient is φ = 621540400.

The previous prime is 623507603. The next prime is 623507659. The reversal of 623507617 is 716705326.

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 114147856 + 509359761 = 10684^2 + 22569^2 .

It is a cyclic number.

It is not a de Polignac number, because 623507617 - 2¹⁵ = 623474849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623507117) 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, 983134 + ... + 983767.

It is an arithmetic number, because the mean of its divisors is an integer number (156368709).

Almost surely, 2^623507617 is an apocalyptic number.

It is an amenable number.

623507617 is a deficient number, since it is larger than the sum of its proper divisors (1967219).

623507617 is a wasteful number, since it uses less digits than its factorization.

623507617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967218.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 623507617 is about 24970.1345010394. The cubic root of 623507617 is about 854.3069138940.

The spelling of 623507617 in words is "six hundred twenty-three million, five hundred seven thousand, six hundred seventeen".