72553787 has 4 divisors (see below), whose sum is σ = 72677976. Its totient is φ = 72429600.

The previous prime is 72553783. The next prime is 72553801. The reversal of 72553787 is 78735527.

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 72553787 - 2² = 72553783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72553783) 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, 61214 + ... + 62387.

It is an arithmetic number, because the mean of its divisors is an integer number (18169494).

Almost surely, 2^72553787 is an apocalyptic number.

72553787 is a deficient number, since it is larger than the sum of its proper divisors (124189).

72553787 is a wasteful number, since it uses less digits than its factorization.

72553787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124188.

The product of its digits is 411600, while the sum is 44.

The square root of 72553787 is about 8517.8510787639. The cubic root of 72553787 is about 417.0806373893.

The spelling of 72553787 in words is "seventy-two million, five hundred fifty-three thousand, seven hundred eighty-seven".