123993513 has 24 divisors (see below), whose sum is σ = 205590528. Its totient is φ = 70540992.

The previous prime is 123993511. The next prime is 123993533. The reversal of 123993513 is 315399321.

It is not a de Polignac number, because 123993513 - 2¹ = 123993511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123993511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10456 + ... + 18902.

It is an arithmetic number, because the mean of its divisors is an integer number (8566272).

Almost surely, 2^123993513 is an apocalyptic number.

It is an amenable number.

123993513 is a deficient number, since it is larger than the sum of its proper divisors (81597015).

123993513 is a wasteful number, since it uses less digits than its factorization.

123993513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8693 (or 8690 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 123993513 is about 11135.2374469519. The cubic root of 123993513 is about 498.6543992994.

The spelling of 123993513 in words is "one hundred twenty-three million, nine hundred ninety-three thousand, five hundred thirteen".