102493189 has 4 divisors (see below), whose sum is σ = 102646156. Its totient is φ = 102340224.

The previous prime is 102493169. The next prime is 102493199. The reversal of 102493189 is 981394201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56700900 + 45792289 = 7530^2 + 6767^2 .

It is a cyclic number.

It is not a de Polignac number, because 102493189 - 2¹¹ = 102491141 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 (102493169) 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 3 ways as a sum of consecutive naturals, for example, 75474 + ... + 76819.

It is an arithmetic number, because the mean of its divisors is an integer number (25661539).

Almost surely, 2^102493189 is an apocalyptic number.

It is an amenable number.

102493189 is a deficient number, since it is larger than the sum of its proper divisors (152967).

102493189 is an equidigital number, since it uses as much as digits as its factorization.

102493189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152966.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 102493189 is about 10123.8919887561. The cubic root of 102493189 is about 467.9847150266.

The spelling of 102493189 in words is "one hundred two million, four hundred ninety-three thousand, one hundred eighty-nine".