123913155 has 16 divisors (see below), whose sum is σ = 208696320. Its totient is φ = 62608608.

The previous prime is 123913133. The next prime is 123913183. The reversal of 123913155 is 551319321.

It is not a de Polignac number, because 123913155 - 2⁵ = 123913123 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, 217107 + ... + 217676.

It is an arithmetic number, because the mean of its divisors is an integer number (13043520).

Almost surely, 2^123913155 is an apocalyptic number.

123913155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123913155 is a deficient number, since it is larger than the sum of its proper divisors (84783165).

123913155 is a wasteful number, since it uses less digits than its factorization.

123913155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434810.

The product of its digits is 4050, while the sum is 30.

The square root of 123913155 is about 11131.6285870487. The cubic root of 123913155 is about 498.5466529913.

The spelling of 123913155 in words is "one hundred twenty-three million, nine hundred thirteen thousand, one hundred fifty-five".