72093311 has 4 divisors (see below), whose sum is σ = 76334112. Its totient is φ = 67852512.

The previous prime is 72093299. The next prime is 72093319. The reversal of 72093311 is 11339027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11339027 = 7 ⋅1619861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72093311 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 (72093319) 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, 2120375 + ... + 2120408.

It is an arithmetic number, because the mean of its divisors is an integer number (19083528).

Almost surely, 2^72093311 is an apocalyptic number.

72093311 is a deficient number, since it is larger than the sum of its proper divisors (4240801).

72093311 is a wasteful number, since it uses less digits than its factorization.

72093311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240800.

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

The square root of 72093311 is about 8490.7779973333. Note that the first 3 decimals coincide. The cubic root of 72093311 is about 416.1964043455.

The spelling of 72093311 in words is "seventy-two million, ninety-three thousand, three hundred eleven".