99038729 has 4 divisors (see below), whose sum is σ = 101145984. Its totient is φ = 96931476.

The previous prime is 99038711. The next prime is 99038767. The reversal of 99038729 is 92783099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92783099 = 19 ⋅4883321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99038729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 2107207 = 99038729 / (9 + 9 + 0 + 3 + 8 + 7 + 2 + 9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99038789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053557 + ... + 1053650.

It is an arithmetic number, because the mean of its divisors is an integer number (25286496).

Almost surely, 2^99038729 is an apocalyptic number.

It is an amenable number.

99038729 is a deficient number, since it is larger than the sum of its proper divisors (2107255).

99038729 is a wasteful number, since it uses less digits than its factorization.

99038729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107254.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 99038729 is about 9951.8203862409. The cubic root of 99038729 is about 462.6668172529. Note that the first 3 decimals are identical.

The spelling of 99038729 in words is "ninety-nine million, thirty-eight thousand, seven hundred twenty-nine".