147669745 has 4 divisors (see below), whose sum is σ = 177203700. Its totient is φ = 118135792.

The previous prime is 147669733. The next prime is 147669749. The reversal of 147669745 is 547966741.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82011136 + 65658609 = 9056^2 + 8103^2 .

It is a cyclic number.

It is not a de Polignac number, because 147669745 - 2⁹ = 147669233 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (147669749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14766970 + ... + 14766979.

It is an arithmetic number, because the mean of its divisors is an integer number (44300925).

Almost surely, 2^147669745 is an apocalyptic number.

It is an amenable number.

147669745 is a deficient number, since it is larger than the sum of its proper divisors (29533955).

147669745 is an equidigital number, since it uses as much as digits as its factorization.

147669745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29533954.

The product of its digits is 1270080, while the sum is 49.

The square root of 147669745 is about 12151.9440831498. The cubic root of 147669745 is about 528.5635065598.

The spelling of 147669745 in words is "one hundred forty-seven million, six hundred sixty-nine thousand, seven hundred forty-five".