147409621 has 2 divisors, whose sum is σ = 147409622. Its totient is φ = 147409620.

The previous prime is 147409609. The next prime is 147409649. The reversal of 147409621 is 126904741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 22193521 = 11190^2 + 4711^2 .

It is an emirp because it is prime and its reverse (126904741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147409621 - 2⁹ = 147409109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147403621) 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, 73704810 + 73704811.

It is an arithmetic number, because the mean of its divisors is an integer number (73704811).

Almost surely, 2^147409621 is an apocalyptic number.

It is an amenable number.

147409621 is a deficient number, since it is larger than the sum of its proper divisors (1).

147409621 is an equidigital number, since it uses as much as digits as its factorization.

147409621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 147409621 is about 12141.2363867936. The cubic root of 147409621 is about 528.2529648064.

The spelling of 147409621 in words is "one hundred forty-seven million, four hundred nine thousand, six hundred twenty-one".