72446789 has 2 divisors, whose sum is σ = 72446790. Its totient is φ = 72446788.

The previous prime is 72446779. The next prime is 72446797. The reversal of 72446789 is 98764427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 34316164 = 6175^2 + 5858^2 .

It is an emirp because it is prime and its reverse (98764427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72446789 - 2⁸ = 72446533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72446719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36223394 + 36223395.

It is an arithmetic number, because the mean of its divisors is an integer number (36223395).

Almost surely, 2^72446789 is an apocalyptic number.

It is an amenable number.

72446789 is a deficient number, since it is larger than the sum of its proper divisors (1).

72446789 is an equidigital number, since it uses as much as digits as its factorization.

72446789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 72446789 is about 8511.5679519111. The cubic root of 72446789 is about 416.8755079650.

The spelling of 72446789 in words is "seventy-two million, four hundred forty-six thousand, seven hundred eighty-nine".