625441819 has 2 divisors, whose sum is σ = 625441820. Its totient is φ = 625441818.

The previous prime is 625441801. The next prime is 625441841. The reversal of 625441819 is 918144526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625441819 - 2⁹ = 625441307 is a prime.

It is a super-2 number, since 2×625441819² = 782354937908057522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625441889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312720909 + 312720910.

It is an arithmetic number, because the mean of its divisors is an integer number (312720910).

Almost surely, 2^625441819 is an apocalyptic number.

625441819 is a deficient number, since it is larger than the sum of its proper divisors (1).

625441819 is an equidigital number, since it uses as much as digits as its factorization.

625441819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 625441819 is about 25008.8348189195. The cubic root of 625441819 is about 855.1893925141.

The spelling of 625441819 in words is "six hundred twenty-five million, four hundred forty-one thousand, eight hundred nineteen".