72097082 has 4 divisors (see below), whose sum is σ = 108145626. Its totient is φ = 36048540.

The previous prime is 72097079. The next prime is 72097097. The reversal of 72097082 is 28079027.

It is a Cunningham number, because it is equal to 8491²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28079027 = 269 ⋅104383.

It can be written as a sum of positive squares in only one way, i.e., 72097081 + 1 = 8491^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18024269 + ... + 18024272.

Almost surely, 2^72097082 is an apocalyptic number.

72097082 is a deficient number, since it is larger than the sum of its proper divisors (36048544).

72097082 is a wasteful number, since it uses less digits than its factorization.

72097082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36048543.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 72097082 is about 8491.0000588859. Note that the first 4 decimals coincide. The cubic root of 72097082 is about 416.2036609100.

The spelling of 72097082 in words is "seventy-two million, ninety-seven thousand, eighty-two".