73172497 has 2 divisors, whose sum is σ = 73172498. Its totient is φ = 73172496.

The previous prime is 73172461. The next prime is 73172501. The reversal of 73172497 is 79427137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54302161 + 18870336 = 7369^2 + 4344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73172497 is a prime.

It is not a weakly prime, because it can be changed into another prime (73172417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36586248 + 36586249.

It is an arithmetic number, because the mean of its divisors is an integer number (36586249).

Almost surely, 2^73172497 is an apocalyptic number.

It is an amenable number.

73172497 is a deficient number, since it is larger than the sum of its proper divisors (1).

73172497 is an equidigital number, since it uses as much as digits as its factorization.

73172497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 73172497 is about 8554.0924124071. The cubic root of 73172497 is about 418.2628494906.

The spelling of 73172497 in words is "seventy-three million, one hundred seventy-two thousand, four hundred ninety-seven".