102231993 has 4 divisors (see below), whose sum is σ = 136309328. Its totient is φ = 68154660.

The previous prime is 102231991. The next prime is 102232001. The reversal of 102231993 is 399132201.

It is a happy number.

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.

It is not a de Polignac number, because 102231993 - 2¹ = 102231991 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 102231993.

It is not an unprimeable number, because it can be changed into a prime (102231991) 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, 17038663 + ... + 17038668.

It is an arithmetic number, because the mean of its divisors is an integer number (34077332).

Almost surely, 2^102231993 is an apocalyptic number.

It is an amenable number.

102231993 is a deficient number, since it is larger than the sum of its proper divisors (34077335).

102231993 is an equidigital number, since it uses as much as digits as its factorization.

102231993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34077334.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 102231993 is about 10110.9837800285. The cubic root of 102231993 is about 467.5868358433.

The spelling of 102231993 in words is "one hundred two million, two hundred thirty-one thousand, nine hundred ninety-three".