73219997 has 2 divisors, whose sum is σ = 73219998. Its totient is φ = 73219996.

The previous prime is 73219967. The next prime is 73219999. The reversal of 73219997 is 79991237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72012196 + 1207801 = 8486^2 + 1099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73219997 is a prime.

It is a super-2 number, since 2×73219997² = 10722335921360018, which contains 22 as substring.

Together with 73219999, 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 (73219999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36609998 + 36609999.

It is an arithmetic number, because the mean of its divisors is an integer number (36609999).

Almost surely, 2^73219997 is an apocalyptic number.

It is an amenable number.

73219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

73219997 is an equidigital number, since it uses as much as digits as its factorization.

73219997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 47.

The square root of 73219997 is about 8556.8684108148. The cubic root of 73219997 is about 418.3533351635.

The spelling of 73219997 in words is "seventy-three million, two hundred nineteen thousand, nine hundred ninety-seven".