123985637 has 4 divisors (see below), whose sum is σ = 124877760. Its totient is φ = 123093516.

The previous prime is 123985619. The next prime is 123985639. The reversal of 123985637 is 736589321.

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 123985637 - 2¹⁰ = 123984613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123985639) 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, 445853 + ... + 446130.

It is an arithmetic number, because the mean of its divisors is an integer number (31219440).

Almost surely, 2^123985637 is an apocalyptic number.

It is an amenable number.

123985637 is a deficient number, since it is larger than the sum of its proper divisors (892123).

123985637 is an equidigital number, since it uses as much as digits as its factorization.

123985637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892122.

The product of its digits is 272160, while the sum is 44.

The square root of 123985637 is about 11134.8837892454. The cubic root of 123985637 is about 498.6438409911.

The spelling of 123985637 in words is "one hundred twenty-three million, nine hundred eighty-five thousand, six hundred thirty-seven".