72198097 has 2 divisors, whose sum is σ = 72198098. Its totient is φ = 72198096.

The previous prime is 72198067. The next prime is 72198149. The reversal of 72198097 is 79089127.

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., 70963776 + 1234321 = 8424^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 72198097 - 2¹¹ = 72196049 is a prime.

It is not a weakly prime, because it can be changed into another prime (72198067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36099048 + 36099049.

It is an arithmetic number, because the mean of its divisors is an integer number (36099049).

Almost surely, 2^72198097 is an apocalyptic number.

It is an amenable number.

72198097 is a deficient number, since it is larger than the sum of its proper divisors (1).

72198097 is an equidigital number, since it uses as much as digits as its factorization.

72198097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 72198097 is about 8496.9463338308. The cubic root of 72198097 is about 416.3979507553.

The spelling of 72198097 in words is "seventy-two million, one hundred ninety-eight thousand, ninety-seven".