73117997 has 2 divisors, whose sum is σ = 73117998. Its totient is φ = 73117996.

The previous prime is 73117981. The next prime is 73117999. The reversal of 73117997 is 79971137.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59197636 + 13920361 = 7694^2 + 3731^2 .

It is a cyclic number.

It is not a de Polignac number, because 73117997 - 2⁴ = 73117981 is a prime.

Together with 73117999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73117999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36558998 + 36558999.

It is an arithmetic number, because the mean of its divisors is an integer number (36558999).

Almost surely, 2^73117997 is an apocalyptic number.

It is an amenable number.

73117997 is a deficient number, since it is larger than the sum of its proper divisors (1).

73117997 is an equidigital number, since it uses as much as digits as its factorization.

73117997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83349, while the sum is 44.

The square root of 73117997 is about 8550.9062092857. The cubic root of 73117997 is about 418.1589808331.

The spelling of 73117997 in words is "seventy-three million, one hundred seventeen thousand, nine hundred ninety-seven".