147644969 has 8 divisors (see below), whose sum is σ = 149504520. Its totient is φ = 145794816.

The previous prime is 147644957. The next prime is 147644989. The reversal of 147644969 is 969446741.

It can be written as a sum of positive squares in 4 ways, for example, as 1525225 + 146119744 = 1235^2 + 12088^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147644969 is a prime.

It is a super-2 number, since 2×147644969² = 43598073742021922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147644989) 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, 32417 + ... + 36689.

It is an arithmetic number, because the mean of its divisors is an integer number (18688065).

Almost surely, 2^147644969 is an apocalyptic number.

It is an amenable number.

147644969 is a deficient number, since it is larger than the sum of its proper divisors (1859551).

147644969 is a wasteful number, since it uses less digits than its factorization.

147644969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699.

The product of its digits is 1306368, while the sum is 50.

The square root of 147644969 is about 12150.9246150242. The cubic root of 147644969 is about 528.5339441469.

The spelling of 147644969 in words is "one hundred forty-seven million, six hundred forty-four thousand, nine hundred sixty-nine".