72747151 has 4 divisors (see below), whose sum is σ = 72765000. Its totient is φ = 72729304.

The previous prime is 72747133. The next prime is 72747163. The reversal of 72747151 is 15174727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72747151 - 2¹¹ = 72745103 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 (72757151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525 + ... + 12073.

It is an arithmetic number, because the mean of its divisors is an integer number (18191250).

Almost surely, 2^72747151 is an apocalyptic number.

72747151 is a deficient number, since it is larger than the sum of its proper divisors (17849).

72747151 is a wasteful number, since it uses less digits than its factorization.

72747151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17848.

The product of its digits is 13720, while the sum is 34.

The square root of 72747151 is about 8529.1940416431. The cubic root of 72747151 is about 417.4508309792.

The spelling of 72747151 in words is "seventy-two million, seven hundred forty-seven thousand, one hundred fifty-one".