749498621 has 2 divisors, whose sum is σ = 749498622. Its totient is φ = 749498620.

The previous prime is 749498611. The next prime is 749498647. The reversal of 749498621 is 126894947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 740438521 + 9060100 = 27211^2 + 3010^2 .

It is an emirp because it is prime and its reverse (126894947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 749498621 - 2¹⁰ = 749497597 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 749498621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749498611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374749310 + 374749311.

It is an arithmetic number, because the mean of its divisors is an integer number (374749311).

Almost surely, 2^749498621 is an apocalyptic number.

It is an amenable number.

749498621 is a deficient number, since it is larger than the sum of its proper divisors (1).

749498621 is an equidigital number, since it uses as much as digits as its factorization.

749498621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 749498621 is about 27376.9724586193. The cubic root of 749498621 is about 908.3577921497.

The spelling of 749498621 in words is "seven hundred forty-nine million, four hundred ninety-eight thousand, six hundred twenty-one".