147143921 has 2 divisors, whose sum is σ = 147143922. Its totient is φ = 147143920.

The previous prime is 147143873. The next prime is 147143947. The reversal of 147143921 is 129341741.

147143921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146143921 + 1000000 = 12089^2 + 1000^2 .

It is an emirp because it is prime and its reverse (129341741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147143921 - 2²⁶ = 80035057 is a prime.

It is not a weakly prime, because it can be changed into another prime (147143951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73571960 + 73571961.

It is an arithmetic number, because the mean of its divisors is an integer number (73571961).

Almost surely, 2^147143921 is an apocalyptic number.

It is an amenable number.

147143921 is a deficient number, since it is larger than the sum of its proper divisors (1).

147143921 is an equidigital number, since it uses as much as digits as its factorization.

147143921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 147143921 is about 12130.2894029780. The cubic root of 147143921 is about 527.9353889125.

The spelling of 147143921 in words is "one hundred forty-seven million, one hundred forty-three thousand, nine hundred twenty-one".