147268021 has 2 divisors, whose sum is σ = 147268022. Its totient is φ = 147268020.

The previous prime is 147268007. The next prime is 147268039. The reversal of 147268021 is 120862741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143065521 + 4202500 = 11961^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 147268021 - 2⁹ = 147267509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147208021) 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, 73634010 + 73634011.

It is an arithmetic number, because the mean of its divisors is an integer number (73634011).

Almost surely, 2^147268021 is an apocalyptic number.

It is an amenable number.

147268021 is a deficient number, since it is larger than the sum of its proper divisors (1).

147268021 is an equidigital number, since it uses as much as digits as its factorization.

147268021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 147268021 is about 12135.4036191632. The cubic root of 147268021 is about 528.0837660278.

The spelling of 147268021 in words is "one hundred forty-seven million, two hundred sixty-eight thousand, twenty-one".