624749 has 6 divisors (see below), whose sum is σ = 653646. Its totient is φ = 597080.

The previous prime is 624737. The next prime is 624763. The reversal of 624749 is 947426.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 13225 = 782^2 + 115^2 .

It is not a de Polignac number, because 624749 - 2¹⁶ = 559213 is a prime.

It is a super-2 number, since 2×624749² = 780622626002, 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 (624709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (108941).

2⁶²⁴⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

624749 is a deficient number, since it is larger than the sum of its proper divisors (28897).

624749 is a wasteful number, since it uses less digits than its factorization.

624749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1204 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 624749 is about 790.4106527622. The cubic root of 624749 is about 85.4873503623.

The spelling of 624749 in words is "six hundred twenty-four thousand, seven hundred forty-nine".