625968197 has 4 divisors (see below), whose sum is σ = 641235756. Its totient is φ = 610700640.

The previous prime is 625968179. The next prime is 625968199. The reversal of 625968197 is 791869526.

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 10233601 + 615734596 = 3199^2 + 24814^2 .

It is a cyclic number.

It is not a de Polignac number, because 625968197 - 2⁸ = 625967941 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 (625968199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7633718 + ... + 7633799.

It is an arithmetic number, because the mean of its divisors is an integer number (160308939).

Almost surely, 2^625968197 is an apocalyptic number.

It is an amenable number.

625968197 is a deficient number, since it is larger than the sum of its proper divisors (15267559).

625968197 is a wasteful number, since it uses less digits than its factorization.

625968197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15267558.

The product of its digits is 1632960, while the sum is 53.

The square root of 625968197 is about 25019.3564465595. The cubic root of 625968197 is about 855.4292371823.

The spelling of 625968197 in words is "six hundred twenty-five million, nine hundred sixty-eight thousand, one hundred ninety-seven".