625849859 has 2 divisors, whose sum is σ = 625849860. Its totient is φ = 625849858.

The previous prime is 625849837. The next prime is 625849879. The reversal of 625849859 is 958948526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625849859 - 2²⁴ = 609072643 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (625849879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312924929 + 312924930.

It is an arithmetic number, because the mean of its divisors is an integer number (312924930).

Almost surely, 2^625849859 is an apocalyptic number.

625849859 is a deficient number, since it is larger than the sum of its proper divisors (1).

625849859 is an equidigital number, since it uses as much as digits as its factorization.

625849859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 56.

The square root of 625849859 is about 25016.9914058425. The cubic root of 625849859 is about 855.3753280725.

The spelling of 625849859 in words is "six hundred twenty-five million, eight hundred forty-nine thousand, eight hundred fifty-nine".