73421539 has 2 divisors, whose sum is σ = 73421540. Its totient is φ = 73421538.

The previous prime is 73421507. The next prime is 73421549. The reversal of 73421539 is 93512437.

It is a strong prime.

It is an emirp because it is prime and its reverse (93512437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73421539 - 2⁵ = 73421507 is a prime.

It is not a weakly prime, because it can be changed into another prime (73421549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36710769 + 36710770.

It is an arithmetic number, because the mean of its divisors is an integer number (36710770).

Almost surely, 2^73421539 is an apocalyptic number.

73421539 is a deficient number, since it is larger than the sum of its proper divisors (1).

73421539 is an equidigital number, since it uses as much as digits as its factorization.

73421539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 73421539 is about 8568.6369394438. The cubic root of 73421539 is about 418.7368302385.

The spelling of 73421539 in words is "seventy-three million, four hundred twenty-one thousand, five hundred thirty-nine".