623485861 has 4 divisors (see below), whose sum is σ = 632267424. Its totient is φ = 614704300.

The previous prime is 623485847. The next prime is 623485867. The reversal of 623485861 is 168584326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 623485861 - 2⁹ = 623485349 is a prime.

It is a super-2 number, since 2×623485861² = 777469237733822642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623485867) 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, 4390675 + ... + 4390816.

It is an arithmetic number, because the mean of its divisors is an integer number (158066856).

Almost surely, 2^623485861 is an apocalyptic number.

It is an amenable number.

623485861 is a deficient number, since it is larger than the sum of its proper divisors (8781563).

623485861 is an equidigital number, since it uses as much as digits as its factorization.

623485861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8781562.

The product of its digits is 276480, while the sum is 43.

The square root of 623485861 is about 24969.6988568144. The cubic root of 623485861 is about 854.2969773581.

The spelling of 623485861 in words is "six hundred twenty-three million, four hundred eighty-five thousand, eight hundred sixty-one".