99021293 has 16 divisors (see below), whose sum is σ = 121152000. Its totient is φ = 79039152.

The previous prime is 99021281. The next prime is 99021301. The reversal of 99021293 is 39212099.

It is a cyclic number.

It is not a de Polignac number, because 99021293 - 2⁶ = 99021229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021253) 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, 1538 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (7572000).

Almost surely, 2^99021293 is an apocalyptic number.

It is an amenable number.

99021293 is a deficient number, since it is larger than the sum of its proper divisors (22130707).

99021293 is a wasteful number, since it uses less digits than its factorization.

99021293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12704.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 99021293 is about 9950.9443270476. The cubic root of 99021293 is about 462.6396644675.

It can be divided in two parts, 99021 and 293, that multiplied together give a triangular number (29013153 = T₇₆₁₇).

The spelling of 99021293 in words is "ninety-nine million, twenty-one thousand, two hundred ninety-three".