123637661 has 8 divisors (see below), whose sum is σ = 142082304. Its totient is φ = 105388560.

The previous prime is 123637649. The next prime is 123637681. The reversal of 123637661 is 166736321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123637661 - 2⁶ = 123637597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123637601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47525 + ... + 50058.

It is an arithmetic number, because the mean of its divisors is an integer number (17760288).

Almost surely, 2^123637661 is an apocalyptic number.

It is an amenable number.

123637661 is a deficient number, since it is larger than the sum of its proper divisors (18444643).

123637661 is an equidigital number, since it uses as much as digits as its factorization.

123637661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97771.

The product of its digits is 27216, while the sum is 35.

The square root of 123637661 is about 11119.2473216491. The cubic root of 123637661 is about 498.1769087557.

The spelling of 123637661 in words is "one hundred twenty-three million, six hundred thirty-seven thousand, six hundred sixty-one".