72022747 has 4 divisors (see below), whose sum is σ = 74506320. Its totient is φ = 69539176.

The previous prime is 72022733. The next prime is 72022763. The reversal of 72022747 is 74722027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74722027 = 421 ⋅177487.

It is a cyclic number.

It is not a de Polignac number, because 72022747 - 2¹¹ = 72020699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72022777) 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, 1241743 + ... + 1241800.

It is an arithmetic number, because the mean of its divisors is an integer number (18626580).

Almost surely, 2^72022747 is an apocalyptic number.

72022747 is a deficient number, since it is larger than the sum of its proper divisors (2483573).

72022747 is a wasteful number, since it uses less digits than its factorization.

72022747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483572.

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 72022747 is about 8486.6216482179. The cubic root of 72022747 is about 416.0605708000.

The spelling of 72022747 in words is "seventy-two million, twenty-two thousand, seven hundred forty-seven".