123151013 has 4 divisors (see below), whose sum is σ = 123539820. Its totient is φ = 122762208.

The previous prime is 123150997. The next prime is 123151019. The reversal of 123151013 is 310151321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37736449 + 85414564 = 6143^2 + 9242^2 .

It is a cyclic number.

It is not a de Polignac number, because 123151013 - 2⁴ = 123150997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123150982 and 123151000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123151019) 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, 193928 + ... + 194561.

It is an arithmetic number, because the mean of its divisors is an integer number (30884955).

Almost surely, 2^123151013 is an apocalyptic number.

It is an amenable number.

123151013 is a deficient number, since it is larger than the sum of its proper divisors (388807).

123151013 is an equidigital number, since it uses as much as digits as its factorization.

123151013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388806.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 123151013 is about 11097.3426098323. The cubic root of 123151013 is about 497.5224275471.

The spelling of 123151013 in words is "one hundred twenty-three million, one hundred fifty-one thousand, thirteen".