147649 has 6 divisors (see below), whose sum is σ = 156210. Its totient is φ = 139536.

The previous prime is 147647. The next prime is 147661. The reversal of 147649 is 946741.

It can be written as a sum of positive squares in only one way, i.e., 144400 + 3249 = 380^2 + 57^2 .

It is not a de Polignac number, because 147649 - 2¹ = 147647 is a prime.

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 147649.

It is not an unprimeable number, because it can be changed into a prime (147647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (26035).

2¹⁴⁷⁶⁴⁹ is an apocalyptic number.

147649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

147649 is a deficient number, since it is larger than the sum of its proper divisors (8561).

147649 is an equidigital number, since it uses as much as digits as its factorization.

147649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 428 counting only the distinct ones).

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

The square root of 147649 is about 384.2512199070. The cubic root of 147649 is about 52.8538754111.

The spelling of 147649 in words is "one hundred forty-seven thousand, six hundred forty-nine".