147891839 has 4 divisors (see below), whose sum is σ = 155675640. Its totient is φ = 140108040.

The previous prime is 147891787. The next prime is 147891841. The reversal of 147891839 is 938198741.

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 147891839 - 2²⁴ = 131114623 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 (147891859) 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, 3891872 + ... + 3891909.

It is an arithmetic number, because the mean of its divisors is an integer number (38918910).

Almost surely, 2^147891839 is an apocalyptic number.

147891839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

147891839 is a deficient number, since it is larger than the sum of its proper divisors (7783801).

147891839 is an equidigital number, since it uses as much as digits as its factorization.

147891839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7783800.

The product of its digits is 435456, while the sum is 50.

The square root of 147891839 is about 12161.0788583908. The cubic root of 147891839 is about 528.8283587834.

The spelling of 147891839 in words is "one hundred forty-seven million, eight hundred ninety-one thousand, eight hundred thirty-nine".