147638 has 4 divisors (see below), whose sum is σ = 221460. Its totient is φ = 73818.

The previous prime is 147629. The next prime is 147647. The reversal of 147638 is 836741.

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

It is an interprime number because it is at equal distance from previous prime (147629) and next prime (147647).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 147638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36908 + ... + 36911.

It is an arithmetic number, because the mean of its divisors is an integer number (55365).

2¹⁴⁷⁶³⁸ is an apocalyptic number.

147638 is a deficient number, since it is larger than the sum of its proper divisors (73822).

147638 is an equidigital number, since it uses as much as digits as its factorization.

147638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73821.

The product of its digits is 4032, while the sum is 29.

The square root of 147638 is about 384.2369060879. The cubic root of 147638 is about 52.8525628227.

The spelling of 147638 in words is "one hundred forty-seven thousand, six hundred thirty-eight".