72345293 has 4 divisors (see below), whose sum is σ = 76152960. Its totient is φ = 68537628.

The previous prime is 72345239. The next prime is 72345337. The reversal of 72345293 is 39254327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72345293 - 2¹⁴ = 72328909 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 (72345223) 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, 1903805 + ... + 1903842.

It is an arithmetic number, because the mean of its divisors is an integer number (19038240).

Almost surely, 2^72345293 is an apocalyptic number.

It is an amenable number.

72345293 is a deficient number, since it is larger than the sum of its proper divisors (3807667).

72345293 is a wasteful number, since it uses less digits than its factorization.

72345293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807666.

The product of its digits is 45360, while the sum is 35.

The square root of 72345293 is about 8505.6036234943. The cubic root of 72345293 is about 416.6807398624.

The spelling of 72345293 in words is "seventy-two million, three hundred forty-five thousand, two hundred ninety-three".