99420729 has 16 divisors (see below), whose sum is σ = 137579520. Its totient is φ = 63786240.

The previous prime is 99420719. The next prime is 99420757. The reversal of 99420729 is 92702499.

It is not a de Polignac number, because 99420729 - 2¹¹ = 99418681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99420719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27624 + ... + 31014.

It is an arithmetic number, because the mean of its divisors is an integer number (8598720).

Almost surely, 2^99420729 is an apocalyptic number.

It is an amenable number.

99420729 is a deficient number, since it is larger than the sum of its proper divisors (38158791).

99420729 is a wasteful number, since it uses less digits than its factorization.

99420729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 99420729 is about 9970.9943837112. The cubic root of 99420729 is about 463.2609012711.

The spelling of 99420729 in words is "ninety-nine million, four hundred twenty thousand, seven hundred twenty-nine".