623660534 has 12 divisors (see below), whose sum is σ = 1088224164. Its totient is φ = 267283044.

The previous prime is 623660533. The next prime is 623660539. The reversal of 623660534 is 435066326.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 623660494 and 623660503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623660533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3181844 + ... + 3182039.

It is an arithmetic number, because the mean of its divisors is an integer number (90685347).

Almost surely, 2^623660534 is an apocalyptic number.

623660534 is a deficient number, since it is larger than the sum of its proper divisors (464563630).

623660534 is a wasteful number, since it uses less digits than its factorization.

623660534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6363899 (or 6363892 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 623660534 is about 24973.1963112454. The cubic root of 623660534 is about 854.3767485779.

The spelling of 623660534 in words is "six hundred twenty-three million, six hundred sixty thousand, five hundred thirty-four".