125673813 has 6 divisors (see below), whose sum is σ = 181528854. Its totient is φ = 83782536.

The previous prime is 125673803. The next prime is 125673829. The reversal of 125673813 is 318376521.

125673813 is a `hidden beast` number, since 12 + 567 + 3 + 81 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 114961284 + 10712529 = 10722^2 + 3273^2 .

It is not a de Polignac number, because 125673813 - 2⁵ = 125673781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125673803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6981870 + ... + 6981887.

It is an arithmetic number, because the mean of its divisors is an integer number (30254809).

Almost surely, 2^125673813 is an apocalyptic number.

It is an amenable number.

125673813 is a deficient number, since it is larger than the sum of its proper divisors (55855041).

125673813 is a wasteful number, since it uses less digits than its factorization.

125673813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13963763 (or 13963760 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 125673813 is about 11210.4332208885. The cubic root of 125673813 is about 500.8968078430.

The spelling of 125673813 in words is "one hundred twenty-five million, six hundred seventy-three thousand, eight hundred thirteen".