72222079 has 2 divisors, whose sum is σ = 72222080. Its totient is φ = 72222078.

The previous prime is 72222071. The next prime is 72222083. The reversal of 72222079 is 97022227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72222079 - 2³ = 72222071 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72222079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72222071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36111039 + 36111040.

It is an arithmetic number, because the mean of its divisors is an integer number (36111040).

Almost surely, 2^72222079 is an apocalyptic number.

72222079 is a deficient number, since it is larger than the sum of its proper divisors (1).

72222079 is an equidigital number, since it uses as much as digits as its factorization.

72222079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72222079 is about 8498.3574295272. The cubic root of 72222079 is about 416.4440505399. Note that the first 3 decimals are identical.

It can be divided in two parts, 722 and 22079, that added together give a square (22801 = 151²).

The spelling of 72222079 in words is "seventy-two million, two hundred twenty-two thousand, seventy-nine".