72174947 has 4 divisors (see below), whose sum is σ = 77726880. Its totient is φ = 66623016.

The previous prime is 72174937. The next prime is 72174961. The reversal of 72174947 is 74947127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74947127 = 5483 ⋅13669.

It is a cyclic number.

It is not a de Polignac number, because 72174947 - 2¹² = 72170851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72174917) 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, 2775947 + ... + 2775972.

It is an arithmetic number, because the mean of its divisors is an integer number (19431720).

Almost surely, 2^72174947 is an apocalyptic number.

72174947 is a deficient number, since it is larger than the sum of its proper divisors (5551933).

72174947 is a wasteful number, since it uses less digits than its factorization.

72174947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551932.

The product of its digits is 98784, while the sum is 41.

The square root of 72174947 is about 8495.5839705108. The cubic root of 72174947 is about 416.3534406114.

The spelling of 72174947 in words is "seventy-two million, one hundred seventy-four thousand, nine hundred forty-seven".