72785807 has 2 divisors, whose sum is σ = 72785808. Its totient is φ = 72785806.

The previous prime is 72785803. The next prime is 72785809. The reversal of 72785807 is 70858727.

It is a strong prime.

It is an emirp because it is prime and its reverse (70858727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72785807 - 2² = 72785803 is a prime.

Together with 72785809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72785803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36392903 + 36392904.

It is an arithmetic number, because the mean of its divisors is an integer number (36392904).

Almost surely, 2^72785807 is an apocalyptic number.

72785807 is a deficient number, since it is larger than the sum of its proper divisors (1).

72785807 is an equidigital number, since it uses as much as digits as its factorization.

72785807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 72785807 is about 8531.4598399102. The cubic root of 72785807 is about 417.5247588315.

The spelling of 72785807 in words is "seventy-two million, seven hundred eighty-five thousand, eight hundred seven".