102799321 has 3 divisors (see below), whose sum is σ = 102809461. Its totient is φ = 102789182.

The previous prime is 102799297. The next prime is 102799331. The reversal of 102799321 is 123997201.

It is a happy number.

The square root of 102799321 is 10139.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 102799321 - 2⁹ = 102798809 is a prime.

It is a super-2 number, since 2×102799321² = 21135400796122082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102799331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5070 + ... + 15208.

Almost surely, 2^102799321 is an apocalyptic number.

102799321 is the 10139-th square number.

102799321 is the 5070-th centered octagonal number.

It is an amenable number.

102799321 is a deficient number, since it is larger than the sum of its proper divisors (10140).

102799321 is an frugal number, since it uses more digits than its factorization.

102799321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20278 (or 10139 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The cubic root of 102799321 is about 468.4501856177.

It can be divided in two parts, 10279 and 9321, that added together give a square (19600 = 140²).

The spelling of 102799321 in words is "one hundred two million, seven hundred ninety-nine thousand, three hundred twenty-one".