102200989 has 4 divisors (see below), whose sum is σ = 111492000. Its totient is φ = 92909980.

The previous prime is 102200977. The next prime is 102201007. The reversal of 102200989 is 989002201.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102200989 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 102200989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102200909) 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, 4645489 + ... + 4645510.

It is an arithmetic number, because the mean of its divisors is an integer number (27873000).

Almost surely, 2^102200989 is an apocalyptic number.

It is an amenable number.

102200989 is a deficient number, since it is larger than the sum of its proper divisors (9291011).

102200989 is an equidigital number, since it uses as much as digits as its factorization.

102200989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291010.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 102200989 is about 10109.4504796255. The cubic root of 102200989 is about 467.5395625531.

The spelling of 102200989 in words is "one hundred two million, two hundred thousand, nine hundred eighty-nine".