625784947 has 4 divisors (see below), whose sum is σ = 626063256. Its totient is φ = 625506640.

The previous prime is 625784869. The next prime is 625784993. The reversal of 625784947 is 749487526.

625784947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749487526 = 2 ⋅374743763.

It is a cyclic number.

It is not a de Polignac number, because 625784947 - 2¹⁹ = 625260659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625784894 and 625784903.

It is not an unprimeable number, because it can be changed into a prime (625784147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135754 + ... + 140287.

It is an arithmetic number, because the mean of its divisors is an integer number (156515814).

Almost surely, 2^625784947 is an apocalyptic number.

625784947 is a deficient number, since it is larger than the sum of its proper divisors (278309).

625784947 is a wasteful number, since it uses less digits than its factorization.

625784947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278308.

The product of its digits is 3386880, while the sum is 52.

The square root of 625784947 is about 25015.6940139585. The cubic root of 625784947 is about 855.3457543964.

It can be divided in two parts, 6257 and 84947, that added together give a square (91204 = 302²).

The spelling of 625784947 in words is "six hundred twenty-five million, seven hundred eighty-four thousand, nine hundred forty-seven".