624344491 has 4 divisors (see below), whose sum is σ = 630406192. Its totient is φ = 618282792.

The previous prime is 624344489. The next prime is 624344519. The reversal of 624344491 is 194443426.

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

It is a cyclic number.

It is not a de Polignac number, because 624344491 - 2¹ = 624344489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 624344491.

It is not an unprimeable number, because it can be changed into a prime (624344411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030696 + ... + 3030901.

It is an arithmetic number, because the mean of its divisors is an integer number (157601548).

Almost surely, 2^624344491 is an apocalyptic number.

624344491 is a deficient number, since it is larger than the sum of its proper divisors (6061701).

624344491 is a wasteful number, since it uses less digits than its factorization.

624344491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061700.

The product of its digits is 82944, while the sum is 37.

The square root of 624344491 is about 24986.8863806598. The cubic root of 624344491 is about 854.6889608784.

The spelling of 624344491 in words is "six hundred twenty-four million, three hundred forty-four thousand, four hundred ninety-one".