72194827 has 4 divisors (see below), whose sum is σ = 72328816. Its totient is φ = 72060840.

The previous prime is 72194789. The next prime is 72194831. The reversal of 72194827 is 72849127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72849127 = 13 ⋅5603779.

It is a cyclic number.

It is not a de Polignac number, because 72194827 - 2¹⁹ = 71670539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72194827.

It is not an unprimeable number, because it can be changed into a prime (72194887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66183 + ... + 67264.

It is an arithmetic number, because the mean of its divisors is an integer number (18082204).

Almost surely, 2^72194827 is an apocalyptic number.

72194827 is a deficient number, since it is larger than the sum of its proper divisors (133989).

72194827 is a wasteful number, since it uses less digits than its factorization.

72194827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133988.

The product of its digits is 56448, while the sum is 40.

The square root of 72194827 is about 8496.7539095822. The cubic root of 72194827 is about 416.3916641544.

The spelling of 72194827 in words is "seventy-two million, one hundred ninety-four thousand, eight hundred twenty-seven".