73809997 has 2 divisors, whose sum is σ = 73809998. Its totient is φ = 73809996.

The previous prime is 73809961. The next prime is 73810007. The reversal of 73809997 is 79990837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73719396 + 90601 = 8586^2 + 301^2 .

It is an emirp because it is prime and its reverse (79990837) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73809997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73809907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36904998 + 36904999.

It is an arithmetic number, because the mean of its divisors is an integer number (36904999).

Almost surely, 2^73809997 is an apocalyptic number.

It is an amenable number.

73809997 is a deficient number, since it is larger than the sum of its proper divisors (1).

73809997 is an equidigital number, since it uses as much as digits as its factorization.

73809997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 73809997 is about 8591.2744689016. The cubic root of 73809997 is about 419.4740146508.

The spelling of 73809997 in words is "seventy-three million, eight hundred nine thousand, nine hundred ninety-seven".