624149749 has 2 divisors, whose sum is σ = 624149750. Its totient is φ = 624149748.

The previous prime is 624149717. The next prime is 624149777. The reversal of 624149749 is 947941426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586511524 + 37638225 = 24218^2 + 6135^2 .

It is a cyclic number.

It is not a de Polignac number, because 624149749 - 2⁵ = 624149717 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 624149699 and 624149708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624149789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312074874 + 312074875.

It is an arithmetic number, because the mean of its divisors is an integer number (312074875).

Almost surely, 2^624149749 is an apocalyptic number.

It is an amenable number.

624149749 is a deficient number, since it is larger than the sum of its proper divisors (1).

624149749 is an equidigital number, since it uses as much as digits as its factorization.

624149749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 624149749 is about 24982.9891926487. The cubic root of 624149749 is about 854.6000883897.

The spelling of 624149749 in words is "six hundred twenty-four million, one hundred forty-nine thousand, seven hundred forty-nine".