72737773 has 2 divisors, whose sum is σ = 72737774. Its totient is φ = 72737772.

The previous prime is 72737767. The next prime is 72737807. The reversal of 72737773 is 37773727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55323844 + 17413929 = 7438^2 + 4173^2 .

It is a cyclic number.

It is not a de Polignac number, because 72737773 - 2⁵ = 72737741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72737723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36368886 + 36368887.

It is an arithmetic number, because the mean of its divisors is an integer number (36368887).

Almost surely, 2^72737773 is an apocalyptic number.

It is an amenable number.

72737773 is a deficient number, since it is larger than the sum of its proper divisors (1).

72737773 is an equidigital number, since it uses as much as digits as its factorization.

72737773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302526, while the sum is 43.

The square root of 72737773 is about 8528.6442650635. The cubic root of 72737773 is about 417.4328920309.

The spelling of 72737773 in words is "seventy-two million, seven hundred thirty-seven thousand, seven hundred seventy-three".