72919097 has 4 divisors (see below), whose sum is σ = 72936180. Its totient is φ = 72902016.

The previous prime is 72919087. The next prime is 72919111. The reversal of 72919097 is 79091927.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79091927 = 19 ⋅4162733.

It can be written as a sum of positive squares in 2 ways, for example, as 63744256 + 9174841 = 7984^2 + 3029^2 .

It is a cyclic number.

It is not a de Polignac number, because 72919097 - 2⁴ = 72919081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72919027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4013 + ... + 12725.

It is an arithmetic number, because the mean of its divisors is an integer number (18234045).

Almost surely, 2^72919097 is an apocalyptic number.

It is an amenable number.

72919097 is a deficient number, since it is larger than the sum of its proper divisors (17083).

72919097 is an equidigital number, since it uses as much as digits as its factorization.

72919097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17082.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 72919097 is about 8539.2679428625. The cubic root of 72919097 is about 417.7794693803.

The spelling of 72919097 in words is "seventy-two million, nine hundred nineteen thousand, ninety-seven".