102391219 has 4 divisors (see below), whose sum is σ = 117018544. Its totient is φ = 87763896.

The previous prime is 102391217. The next prime is 102391241. The reversal of 102391219 is 912193201.

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

It is a cyclic number.

It is not a de Polignac number, because 102391219 - 2¹ = 102391217 is a prime.

It is a super-2 number, since 2×102391219² = 20967923456611922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102391217) 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, 7313652 + ... + 7313665.

It is an arithmetic number, because the mean of its divisors is an integer number (29254636).

Almost surely, 2^102391219 is an apocalyptic number.

102391219 is a deficient number, since it is larger than the sum of its proper divisors (14627325).

102391219 is an equidigital number, since it uses as much as digits as its factorization.

102391219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14627324.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 102391219 is about 10118.8546288599. The cubic root of 102391219 is about 467.8294649194.

The spelling of 102391219 in words is "one hundred two million, three hundred ninety-one thousand, two hundred nineteen".