625614989 has 4 divisors (see below), whose sum is σ = 627145020. Its totient is φ = 624084960.

The previous prime is 625614959. The next prime is 625615007. The reversal of 625614989 is 989416526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 499164964 + 126450025 = 22342^2 + 11245^2 .

It is a cyclic number.

It is not a de Polignac number, because 625614989 - 2²⁴ = 608837773 is a prime.

It is a super-2 number, since 2×625614989² = 782788228922940242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625614959) 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 3 ways as a sum of consecutive naturals, for example, 764402 + ... + 765219.

It is an arithmetic number, because the mean of its divisors is an integer number (156786255).

Almost surely, 2^625614989 is an apocalyptic number.

It is an amenable number.

625614989 is a deficient number, since it is larger than the sum of its proper divisors (1530031).

625614989 is a wasteful number, since it uses less digits than its factorization.

625614989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530030.

The product of its digits is 933120, while the sum is 50.

The square root of 625614989 is about 25012.2967557959. The cubic root of 625614989 is about 855.2683124482.

The spelling of 625614989 in words is "six hundred twenty-five million, six hundred fourteen thousand, nine hundred eighty-nine".