625019989 has 8 divisors (see below), whose sum is σ = 682184160. Its totient is φ = 567913200.

The previous prime is 625019957. The next prime is 625019999. The reversal of 625019989 is 989910526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625019989 - 2⁵ = 625019957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625019929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10282 + ... + 36820.

It is an arithmetic number, because the mean of its divisors is an integer number (85273020).

Almost surely, 2^625019989 is an apocalyptic number.

It is an amenable number.

625019989 is a deficient number, since it is larger than the sum of its proper divisors (57164171).

625019989 is a wasteful number, since it uses less digits than its factorization.

625019989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28691.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 625019989 is about 25000.3997768036. The cubic root of 625019989 is about 854.9970880970.

The spelling of 625019989 in words is "six hundred twenty-five million, nineteen thousand, nine hundred eighty-nine".