625396819 has 2 divisors, whose sum is σ = 625396820. Its totient is φ = 625396818.

The previous prime is 625396817. The next prime is 625396853. The reversal of 625396819 is 918693526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625396819 - 2¹ = 625396817 is a prime.

It is a super-2 number, since 2×625396819² = 782242362430637522, which contains 22 as substring.

Together with 625396817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (625396817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312698409 + 312698410.

It is an arithmetic number, because the mean of its divisors is an integer number (312698410).

Almost surely, 2^625396819 is an apocalyptic number.

625396819 is a deficient number, since it is larger than the sum of its proper divisors (1).

625396819 is an equidigital number, since it uses as much as digits as its factorization.

625396819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The square root of 625396819 is about 25007.9351206772. The cubic root of 625396819 is about 855.1688819755.

The spelling of 625396819 in words is "six hundred twenty-five million, three hundred ninety-six thousand, eight hundred nineteen".