123979755 has 16 divisors (see below), whose sum is σ = 201621024. Its totient is φ = 65038080.

The previous prime is 123979747. The next prime is 123979763. The reversal of 123979755 is 557979321.

It is an interprime number because it is at equal distance from previous prime (123979747) and next prime (123979763).

It is not a de Polignac number, because 123979755 - 2³ = 123979747 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66834 + ... + 68663.

It is an arithmetic number, because the mean of its divisors is an integer number (12601314).

Almost surely, 2^123979755 is an apocalyptic number.

123979755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123979755 is a deficient number, since it is larger than the sum of its proper divisors (77641269).

123979755 is a wasteful number, since it uses less digits than its factorization.

123979755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135566.

The product of its digits is 595350, while the sum is 48.

The square root of 123979755 is about 11134.6196612188. The cubic root of 123979755 is about 498.6359554824.

The spelling of 123979755 in words is "one hundred twenty-three million, nine hundred seventy-nine thousand, seven hundred fifty-five".