147639 has 8 divisors (see below), whose sum is σ = 203760. Its totient is φ = 94976.

The previous prime is 147629. The next prime is 147647. The reversal of 147639 is 936741.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 147639 - 2⁵ = 147607 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147639.

It is not an unprimeable number, because it can be changed into a prime (147629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762 + ... + 935.

It is an arithmetic number, because the mean of its divisors is an integer number (25470).

147639 is a Friedman number, since it can be written as 9*4^7+61*3, using all its digits and the basic arithmetic operations.

2¹⁴⁷⁶³⁹ is an apocalyptic number.

147639 is a deficient number, since it is larger than the sum of its proper divisors (56121).

147639 is a wasteful number, since it uses less digits than its factorization.

147639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its digits is 4536, while the sum is 30.

The square root of 147639 is about 384.2382073662. The cubic root of 147639 is about 52.8526821517.

The spelling of 147639 in words is "one hundred forty-seven thousand, six hundred thirty-nine".