624989393 has 8 divisors (see below), whose sum is σ = 715680960. Its totient is φ = 534649680.

The previous prime is 624989279. The next prime is 624989441. The reversal of 624989393 is 393989426.

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 624989393 - 2¹⁰ = 624988369 is a prime.

It is a super-2 number, since 2×624989393² = 781223482725016898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (624989093) 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, 84143 + ... + 91268.

It is an arithmetic number, because the mean of its divisors is an integer number (89460120).

Almost surely, 2^624989393 is an apocalyptic number.

It is an amenable number.

624989393 is a deficient number, since it is larger than the sum of its proper divisors (90691567).

624989393 is a wasteful number, since it uses less digits than its factorization.

624989393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175927.

The product of its digits is 2519424, while the sum is 53.

The square root of 624989393 is about 24999.7878590999. The cubic root of 624989393 is about 854.9831365870.

The spelling of 624989393 in words is "six hundred twenty-four million, nine hundred eighty-nine thousand, three hundred ninety-three".