73990414181 has 2 divisors, whose sum is σ = 73990414182. Its totient is φ = 73990414180.

The previous prime is 73990414163. The next prime is 73990414207. The reversal of 73990414181 is 18141409937.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43737029956 + 30253384225 = 209134^2 + 173935^2 .

It is a cyclic number.

It is not a de Polignac number, because 73990414181 - 2²⁶ = 73923305317 is a prime.

It is a super-2 number, since 2×73990414181² (a number of 23 digits) contains 22 as substring.

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 (73990414781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36995207090 + 36995207091.

It is an arithmetic number, because the mean of its divisors is an integer number (36995207091).

Almost surely, 2^73990414181 is an apocalyptic number.

It is an amenable number.

73990414181 is a deficient number, since it is larger than the sum of its proper divisors (1).

73990414181 is an equidigital number, since it uses as much as digits as its factorization.

73990414181 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 47.

The spelling of 73990414181 in words is "seventy-three billion, nine hundred ninety million, four hundred fourteen thousand, one hundred eighty-one".