72812279 has 2 divisors, whose sum is σ = 72812280. Its totient is φ = 72812278.

The previous prime is 72812261. The next prime is 72812281. The reversal of 72812279 is 97221827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72812279 is a prime.

Together with 72812281, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 72812279 parts by 12067 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72812209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36406139 + 36406140.

It is an arithmetic number, because the mean of its divisors is an integer number (36406140).

Almost surely, 2^72812279 is an apocalyptic number.

72812279 is a deficient number, since it is larger than the sum of its proper divisors (1).

72812279 is an equidigital number, since it uses as much as digits as its factorization.

72812279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 72812279 is about 8533.0111332401. The cubic root of 72812279 is about 417.5753702359.

The spelling of 72812279 in words is "seventy-two million, eight hundred twelve thousand, two hundred seventy-nine".