147644621 has 2 divisors, whose sum is σ = 147644622. Its totient is φ = 147644620.

The previous prime is 147644603. The next prime is 147644647. The reversal of 147644621 is 126446741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112063396 + 35581225 = 10586^2 + 5965^2 .

It is a cyclic number.

It is not a de Polignac number, because 147644621 - 2¹⁰ = 147643597 is a prime.

It is a super-2 number, since 2×147644621² = 43597868220467282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147644821) 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 as a sum of consecutive naturals, namely, 73822310 + 73822311.

It is an arithmetic number, because the mean of its divisors is an integer number (73822311).

Almost surely, 2^147644621 is an apocalyptic number.

It is an amenable number.

147644621 is a deficient number, since it is larger than the sum of its proper divisors (1).

147644621 is an equidigital number, since it uses as much as digits as its factorization.

147644621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 147644621 is about 12150.9102951178. The cubic root of 147644621 is about 528.5335288941.

The spelling of 147644621 in words is "one hundred forty-seven million, six hundred forty-four thousand, six hundred twenty-one".