72787047 has 16 divisors (see below), whose sum is σ = 102930912. Its totient is φ = 45593600.

The previous prime is 72787037. The next prime is 72787051. The reversal of 72787047 is 74078727.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72787047 - 2⁴ = 72787031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72787037) 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 15 ways as a sum of consecutive naturals, for example, 55297 + ... + 56597.

It is an arithmetic number, because the mean of its divisors is an integer number (6433182).

Almost surely, 2^72787047 is an apocalyptic number.

72787047 is a deficient number, since it is larger than the sum of its proper divisors (30143865).

72787047 is a wasteful number, since it uses less digits than its factorization.

72787047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418.

The product of its (nonzero) digits is 153664, while the sum is 42.

The square root of 72787047 is about 8531.5325118058. The cubic root of 72787047 is about 417.5271298421.

The spelling of 72787047 in words is "seventy-two million, seven hundred eighty-seven thousand, forty-seven".