72899999 has 2 divisors, whose sum is σ = 72900000. Its totient is φ = 72899998.

The previous prime is 72899993. The next prime is 72900011. The reversal of 72899999 is 99999827.

It is a weak prime.

It is an emirp because it is prime and its reverse (99999827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72899999 - 2¹² = 72895903 is a prime.

It is a Chen prime.

72899999 is a modest number, since divided by 9999 gives 7289 as remainder.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72899993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36449999 + 36450000.

It is an arithmetic number, because the mean of its divisors is an integer number (36450000).

Almost surely, 2^72899999 is an apocalyptic number.

72899999 is a deficient number, since it is larger than the sum of its proper divisors (1).

72899999 is an equidigital number, since it uses as much as digits as its factorization.

72899999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 62.

The square root of 72899999 is about 8538.1496238939. The cubic root of 72899999 is about 417.7429931150.

The spelling of 72899999 in words is "seventy-two million, eight hundred ninety-nine thousand, nine hundred ninety-nine".