72219899 has 2 divisors, whose sum is σ = 72219900. Its totient is φ = 72219898.

The previous prime is 72219883. The next prime is 72219911. The reversal of 72219899 is 99891227.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72219899 - 2⁴ = 72219883 is a prime.

It is not a weakly prime, because it can be changed into another prime (72219869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36109949 + 36109950.

It is an arithmetic number, because the mean of its divisors is an integer number (36109950).

Almost surely, 2^72219899 is an apocalyptic number.

72219899 is a deficient number, since it is larger than the sum of its proper divisors (1).

72219899 is an equidigital number, since it uses as much as digits as its factorization.

72219899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 72219899 is about 8498.2291684797. The cubic root of 72219899 is about 416.4398604216.

The spelling of 72219899 in words is "seventy-two million, two hundred nineteen thousand, eight hundred ninety-nine".