72101933 has 4 divisors (see below), whose sum is σ = 72162588. Its totient is φ = 72041280.

The previous prime is 72101857. The next prime is 72101951. The reversal of 72101933 is 33910127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33910127 = 1279 ⋅26513.

It can be written as a sum of positive squares in 2 ways, for example, as 4418404 + 67683529 = 2102^2 + 8227^2 .

It is a cyclic number.

It is not a de Polignac number, because 72101933 - 2¹⁰ = 72100909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72101963) 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, 28508 + ... + 30933.

It is an arithmetic number, because the mean of its divisors is an integer number (18040647).

Almost surely, 2^72101933 is an apocalyptic number.

It is an amenable number.

72101933 is a deficient number, since it is larger than the sum of its proper divisors (60655).

72101933 is a wasteful number, since it uses less digits than its factorization.

72101933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60654.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 72101933 is about 8491.2857094789. The cubic root of 72101933 is about 416.2129953547.

The spelling of 72101933 in words is "seventy-two million, one hundred one thousand, nine hundred thirty-three".