147871979 has 4 divisors (see below), whose sum is σ = 149336160. Its totient is φ = 146407800.

The previous prime is 147871973. The next prime is 147871981. The reversal of 147871979 is 979178741.

It is a happy number.

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 147871979 - 2⁸ = 147871723 is a prime.

It is a super-2 number, since 2×147871979² = 43732244346752882, which contains 22 as substring.

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 147871979.

It is not an unprimeable number, because it can be changed into a prime (147871973) 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, 731939 + ... + 732140.

It is an arithmetic number, because the mean of its divisors is an integer number (37334040).

Almost surely, 2^147871979 is an apocalyptic number.

147871979 is a deficient number, since it is larger than the sum of its proper divisors (1464181).

147871979 is a wasteful number, since it uses less digits than its factorization.

147871979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464180.

The product of its digits is 889056, while the sum is 53.

The square root of 147871979 is about 12160.2622915791. The cubic root of 147871979 is about 528.8046860745.

The spelling of 147871979 in words is "one hundred forty-seven million, eight hundred seventy-one thousand, nine hundred seventy-nine".