102193921 has 8 divisors (see below), whose sum is σ = 104666688. Its totient is φ = 99750000.

The previous prime is 102193909. The next prime is 102193937. The reversal of 102193921 is 129391201.

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 102193921 - 2¹³ = 102185729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102193921.

It is not an unprimeable number, because it can be changed into a prime (102193901) 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, 46 + ... + 14296.

It is an arithmetic number, because the mean of its divisors is an integer number (13083336).

Almost surely, 2^102193921 is an apocalyptic number.

It is an amenable number.

102193921 is a deficient number, since it is larger than the sum of its proper divisors (2472767).

102193921 is a wasteful number, since it uses less digits than its factorization.

102193921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14423.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 102193921 is about 10109.1008996844. The cubic root of 102193921 is about 467.5287842954.

The spelling of 102193921 in words is "one hundred two million, one hundred ninety-three thousand, nine hundred twenty-one".