73899817 has 2 divisors, whose sum is σ = 73899818. Its totient is φ = 73899816.

The previous prime is 73899811. The next prime is 73899821. The reversal of 73899817 is 71899837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73633561 + 266256 = 8581^2 + 516^2 .

It is an emirp because it is prime and its reverse (71899837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73899817 - 2⁷ = 73899689 is a prime.

It is a super-2 number, since 2×73899817² = 10922365905266978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73899811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36949908 + 36949909.

It is an arithmetic number, because the mean of its divisors is an integer number (36949909).

Almost surely, 2^73899817 is an apocalyptic number.

It is an amenable number.

73899817 is a deficient number, since it is larger than the sum of its proper divisors (1).

73899817 is an equidigital number, since it uses as much as digits as its factorization.

73899817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 52.

The square root of 73899817 is about 8596.5002762752. The cubic root of 73899817 is about 419.6440994840.

The spelling of 73899817 in words is "seventy-three million, eight hundred ninety-nine thousand, eight hundred seventeen".