99921029 has 8 divisors (see below), whose sum is σ = 111078912. Its totient is φ = 89259120.

The previous prime is 99921011. The next prime is 99921047. The reversal of 99921029 is 92012999.

It is an interprime number because it is at equal distance from previous prime (99921011) and next prime (99921047).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99921029 - 2¹² = 99916933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99921089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123569 + ... + 124374.

It is an arithmetic number, because the mean of its divisors is an integer number (13884864).

Almost surely, 2^99921029 is an apocalyptic number.

It is an amenable number.

99921029 is a deficient number, since it is larger than the sum of its proper divisors (11157883).

99921029 is a wasteful number, since it uses less digits than its factorization.

99921029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247987.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 99921029 is about 9996.0506701397. The cubic root of 99921029 is about 464.0366675467.

The spelling of 99921029 in words is "ninety-nine million, nine hundred twenty-one thousand, twenty-nine".