625009389 has 16 divisors (see below), whose sum is σ = 877778880. Its totient is φ = 394485120.

The previous prime is 625009387. The next prime is 625009393. The reversal of 625009389 is 983900526.

It is not a de Polignac number, because 625009389 - 2¹ = 625009387 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 625009389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625009381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124129 + ... + 129065.

It is an arithmetic number, because the mean of its divisors is an integer number (54861180).

Almost surely, 2^625009389 is an apocalyptic number.

It is an amenable number.

625009389 is a deficient number, since it is larger than the sum of its proper divisors (252769491).

625009389 is a wasteful number, since it uses less digits than its factorization.

625009389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 625009389 is about 25000.1877792948. The cubic root of 625009389 is about 854.9922546407.

The spelling of 625009389 in words is "six hundred twenty-five million, nine thousand, three hundred eighty-nine".