147979 has 4 divisors (see below), whose sum is σ = 159376. Its totient is φ = 136584.

The previous prime is 147977. The next prime is 147997. The reversal of 147979 is 979741.

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 147979 - 2¹ = 147977 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (147977) 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, 5679 + ... + 5704.

It is an arithmetic number, because the mean of its divisors is an integer number (39844).

2¹⁴⁷⁹⁷⁹ is an apocalyptic number.

147979 is a deficient number, since it is larger than the sum of its proper divisors (11397).

147979 is a wasteful number, since it uses less digits than its factorization.

147979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11396.

The product of its digits is 15876, while the sum is 37.

The square root of 147979 is about 384.6803868148. The cubic root of 147979 is about 52.8932227838.

The spelling of 147979 in words is "one hundred forty-seven thousand, nine hundred seventy-nine".