72783238727 has 4 divisors (see below), whose sum is σ = 72786661056. Its totient is φ = 72779816400.

The previous prime is 72783238681. The next prime is 72783238739.

72783238727 is nontrivially palindromic in base 10.

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 72783238727 - 2¹⁸ = 72782976583 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72783238747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679063 + ... + 1721864.

It is an arithmetic number, because the mean of its divisors is an integer number (18196665264).

Almost surely, 2^72783238727 is an apocalyptic number.

72783238727 is a deficient number, since it is larger than the sum of its proper divisors (3422329).

72783238727 is a wasteful number, since it uses less digits than its factorization.

72783238727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422328.

The product of its digits is 11063808, while the sum is 56.

The spelling of 72783238727 in words is "seventy-two billion, seven hundred eighty-three million, two hundred thirty-eight thousand, seven hundred twenty-seven".