147280621 has 2 divisors, whose sum is σ = 147280622. Its totient is φ = 147280620.

The previous prime is 147280619. The next prime is 147280667. The reversal of 147280621 is 126082741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120758121 + 26522500 = 10989^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 147280621 - 2¹ = 147280619 is a prime.

Together with 147280619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147281621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73640310 + 73640311.

It is an arithmetic number, because the mean of its divisors is an integer number (73640311).

Almost surely, 2^147280621 is an apocalyptic number.

It is an amenable number.

147280621 is a deficient number, since it is larger than the sum of its proper divisors (1).

147280621 is an equidigital number, since it uses as much as digits as its factorization.

147280621 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 147280621 is about 12135.9227502485. The cubic root of 147280621 is about 528.0988262462.

The spelling of 147280621 in words is "one hundred forty-seven million, two hundred eighty thousand, six hundred twenty-one".