625949621 has 8 divisors (see below), whose sum is σ = 689616288. Its totient is φ = 563410000.

The previous prime is 625949617. The next prime is 625949629. The reversal of 625949621 is 126949526.

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 625949621 - 2² = 625949617 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 (625949629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280595 + ... + 282816.

It is an arithmetic number, because the mean of its divisors is an integer number (86202036).

Almost surely, 2^625949621 is an apocalyptic number.

It is an amenable number.

625949621 is a deficient number, since it is larger than the sum of its proper divisors (63666667).

625949621 is a wasteful number, since it uses less digits than its factorization.

625949621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563523.

The product of its digits is 233280, while the sum is 44.

The square root of 625949621 is about 25018.9852112351. The cubic root of 625949621 is about 855.4207752984.

The spelling of 625949621 in words is "six hundred twenty-five million, nine hundred forty-nine thousand, six hundred twenty-one".