624537481 has 2 divisors, whose sum is σ = 624537482. Its totient is φ = 624537480.

The previous prime is 624537451. The next prime is 624537497. The reversal of 624537481 is 184735426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420619081 + 203918400 = 20509^2 + 14280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-624537481 is a prime.

It is a super-2 number, since 2×624537481² = 780094130347650722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (624537451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312268740 + 312268741.

It is an arithmetic number, because the mean of its divisors is an integer number (312268741).

Almost surely, 2^624537481 is an apocalyptic number.

It is an amenable number.

624537481 is a deficient number, since it is larger than the sum of its proper divisors (1).

624537481 is an equidigital number, since it uses as much as digits as its factorization.

624537481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 624537481 is about 24990.7479079759. The cubic root of 624537481 is about 854.7770155941. Note that the first 3 decimals are identical.

The spelling of 624537481 in words is "six hundred twenty-four million, five hundred thirty-seven thousand, four hundred eighty-one".