125491693 has 6 divisors (see below), whose sum is σ = 128628842. Its totient is φ = 122429280.

The previous prime is 125491687. The next prime is 125491763. The reversal of 125491693 is 396194521.

It can be written as a sum of positive squares in 3 ways, for example, as 6889 + 125484804 = 83^2 + 11202^2 .

It is not a de Polignac number, because 125491693 - 2⁵ = 125491661 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 (125492693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35646 + ... + 39007.

Almost surely, 2^125491693 is an apocalyptic number.

It is an amenable number.

125491693 is a deficient number, since it is larger than the sum of its proper divisors (3137149).

125491693 is an frugal number, since it uses more digits than its factorization.

125491693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74735 (or 74694 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 125491693 is about 11202.3074855139. The cubic root of 125491693 is about 500.6547329420.

The spelling of 125491693 in words is "one hundred twenty-five million, four hundred ninety-one thousand, six hundred ninety-three".