127925813 has 4 divisors (see below), whose sum is σ = 128043948. Its totient is φ = 127807680.

The previous prime is 127925797. The next prime is 127925849. The reversal of 127925813 is 318529721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318529721 = 1291 ⋅246731.

It can be written as a sum of positive squares in 2 ways, for example, as 106461124 + 21464689 = 10318^2 + 4633^2 .

It is a cyclic number.

It is not a de Polignac number, because 127925813 - 2⁴ = 127925797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127925513) 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, 57428 + ... + 59613.

It is an arithmetic number, because the mean of its divisors is an integer number (32010987).

Almost surely, 2^127925813 is an apocalyptic number.

It is an amenable number.

127925813 is a deficient number, since it is larger than the sum of its proper divisors (118135).

127925813 is a wasteful number, since it uses less digits than its factorization.

127925813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118134.

The product of its digits is 30240, while the sum is 38.

The square root of 127925813 is about 11310.4293906111. The cubic root of 127925813 is about 503.8710368052.

The spelling of 127925813 in words is "one hundred twenty-seven million, nine hundred twenty-five thousand, eight hundred thirteen".