72790097 has 4 divisors (see below), whose sum is σ = 72835380. Its totient is φ = 72744816.

The previous prime is 72790093. The next prime is 72790103. The reversal of 72790097 is 79009727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79009727 = 17 ⋅4647631.

It can be written as a sum of positive squares in 2 ways, for example, as 47348161 + 25441936 = 6881^2 + 5044^2 .

It is a cyclic number.

It is not a de Polignac number, because 72790097 - 2² = 72790093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72790093) 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, 20138 + ... + 23475.

It is an arithmetic number, because the mean of its divisors is an integer number (18208845).

Almost surely, 2^72790097 is an apocalyptic number.

It is an amenable number.

72790097 is a deficient number, since it is larger than the sum of its proper divisors (45283).

72790097 is a wasteful number, since it uses less digits than its factorization.

72790097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45282.

The product of its (nonzero) digits is 55566, while the sum is 41.

The square root of 72790097 is about 8531.7112585929. The cubic root of 72790097 is about 417.5329616487.

The spelling of 72790097 in words is "seventy-two million, seven hundred ninety thousand, ninety-seven".