73499521 has 2 divisors, whose sum is σ = 73499522. Its totient is φ = 73499520.

The previous prime is 73499509. The next prime is 73499527. The reversal of 73499521 is 12599437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 34574400 = 6239^2 + 5880^2 .

It is an emirp because it is prime and its reverse (12599437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73499521 - 2¹³ = 73491329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73499527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36749760 + 36749761.

It is an arithmetic number, because the mean of its divisors is an integer number (36749761).

Almost surely, 2^73499521 is an apocalyptic number.

It is an amenable number.

73499521 is a deficient number, since it is larger than the sum of its proper divisors (1).

73499521 is an equidigital number, since it uses as much as digits as its factorization.

73499521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 73499521 is about 8573.1861638483. The cubic root of 73499521 is about 418.8850264492.

The spelling of 73499521 in words is "seventy-three million, four hundred ninety-nine thousand, five hundred twenty-one".