149647 has 4 divisors (see below), whose sum is σ = 150480. Its totient is φ = 148816.

The previous prime is 149629. The next prime is 149689. The reversal of 149647 is 746941.

149647 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 746941 = 13 ⋅57457.

It is a cyclic number.

It is not a de Polignac number, because 149647 - 2⁷ = 149519 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

149647 is an undulating number in base 12.

149647 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149627) 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, 22 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (37620).

2¹⁴⁹⁶⁴⁷ is an apocalyptic number.

149647 is a deficient number, since it is larger than the sum of its proper divisors (833).

149647 is an equidigital number, since it uses as much as digits as its factorization.

149647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832.

The product of its digits is 6048, while the sum is 31.

The square root of 149647 is about 386.8423451485. The cubic root of 149647 is about 53.0912158903.

The spelling of 149647 in words is "one hundred forty-nine thousand, six hundred forty-seven".