73624421309 has 2 divisors, whose sum is σ = 73624421310. Its totient is φ = 73624421308.

The previous prime is 73624421293. The next prime is 73624421329. The reversal of 73624421309 is 90312442637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61342905625 + 12281515684 = 247675^2 + 110822^2 .

It is a cyclic number.

It is not a de Polignac number, because 73624421309 - 2⁴ = 73624421293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73624421329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36812210654 + 36812210655.

It is an arithmetic number, because the mean of its divisors is an integer number (36812210655).

Almost surely, 2^73624421309 is an apocalyptic number.

It is an amenable number.

73624421309 is a deficient number, since it is larger than the sum of its proper divisors (1).

73624421309 is an equidigital number, since it uses as much as digits as its factorization.

73624421309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 73624421309 in words is "seventy-three billion, six hundred twenty-four million, four hundred twenty-one thousand, three hundred nine".