102748891 has 4 divisors (see below), whose sum is σ = 117427312. Its totient is φ = 88070472.

The previous prime is 102748871. The next prime is 102748907. The reversal of 102748891 is 198847201.

It is a happy number.

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

It is not a de Polignac number, because 102748891 - 2⁵ = 102748859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102748861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7339200 + ... + 7339213.

It is an arithmetic number, because the mean of its divisors is an integer number (29356828).

Almost surely, 2^102748891 is an apocalyptic number.

102748891 is a deficient number, since it is larger than the sum of its proper divisors (14678421).

102748891 is an equidigital number, since it uses as much as digits as its factorization.

102748891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14678420.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 102748891 is about 10136.5127632732. The cubic root of 102748891 is about 468.3735709516.

The spelling of 102748891 in words is "one hundred two million, seven hundred forty-eight thousand, eight hundred ninety-one".