72013122893 has 4 divisors (see below), whose sum is σ = 72217126428. Its totient is φ = 71809119360.

The previous prime is 72013122793. The next prime is 72013122911. The reversal of 72013122893 is 39822131027.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36797597929 + 35215524964 = 191827^2 + 187658^2 .

It is a cyclic number.

It is not a de Polignac number, because 72013122893 - 2²⁰ = 72012074317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72013122793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102001238 + ... + 102001943.

It is an arithmetic number, because the mean of its divisors is an integer number (18054281607).

Almost surely, 2^72013122893 is an apocalyptic number.

It is an amenable number.

72013122893 is a deficient number, since it is larger than the sum of its proper divisors (204003535).

72013122893 is a wasteful number, since it uses less digits than its factorization.

72013122893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204003534.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 72013122893 in words is "seventy-two billion, thirteen million, one hundred twenty-two thousand, eight hundred ninety-three".