73197919 has 2 divisors, whose sum is σ = 73197920. Its totient is φ = 73197918.

The previous prime is 73197863. The next prime is 73197923. The reversal of 73197919 is 91979137.

It is a strong prime.

It is an emirp because it is prime and its reverse (91979137) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73197919 is a prime.

It is a super-2 number, since 2×73197919² = 10715870691861122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73197979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36598959 + 36598960.

It is an arithmetic number, because the mean of its divisors is an integer number (36598960).

Almost surely, 2^73197919 is an apocalyptic number.

73197919 is a deficient number, since it is larger than the sum of its proper divisors (1).

73197919 is an equidigital number, since it uses as much as digits as its factorization.

73197919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107163, while the sum is 46.

The square root of 73197919 is about 8555.5782387867. The cubic root of 73197919 is about 418.3112822917.

The spelling of 73197919 in words is "seventy-three million, one hundred ninety-seven thousand, nine hundred nineteen".