625364009 has 4 divisors (see below), whose sum is σ = 635615940. Its totient is φ = 615112080.

The previous prime is 625363993. The next prime is 625364027. The reversal of 625364009 is 900463526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900463526 = 2 ⋅450231763.

It can be written as a sum of positive squares in 2 ways, for example, as 80281600 + 545082409 = 8960^2 + 23347^2 .

It is a cyclic number.

It is not a de Polignac number, because 625364009 - 2⁴ = 625363993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625364009.

It is not an unprimeable number, because it can be changed into a prime (625364039) 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, 5125874 + ... + 5125995.

It is an arithmetic number, because the mean of its divisors is an integer number (158903985).

Almost surely, 2^625364009 is an apocalyptic number.

It is an amenable number.

625364009 is a deficient number, since it is larger than the sum of its proper divisors (10251931).

625364009 is a wasteful number, since it uses less digits than its factorization.

625364009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10251930.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 625364009 is about 25007.2791202882. The cubic root of 625364009 is about 855.1539268938.

The spelling of 625364009 in words is "six hundred twenty-five million, three hundred sixty-four thousand, nine".