147644891 has 2 divisors, whose sum is σ = 147644892. Its totient is φ = 147644890.

The previous prime is 147644873. The next prime is 147644897. The reversal of 147644891 is 198446741.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 147644891 - 2¹⁸ = 147382747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147644897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73822445 + 73822446.

It is an arithmetic number, because the mean of its divisors is an integer number (73822446).

Almost surely, 2^147644891 is an apocalyptic number.

147644891 is a deficient number, since it is larger than the sum of its proper divisors (1).

147644891 is an equidigital number, since it uses as much as digits as its factorization.

147644891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 147644891 is about 12150.9214053914. The cubic root of 147644891 is about 528.5338510731.

The spelling of 147644891 in words is "one hundred forty-seven million, six hundred forty-four thousand, eight hundred ninety-one".