148309321 has 2 divisors, whose sum is σ = 148309322. Its totient is φ = 148309320.

The previous prime is 148309261. The next prime is 148309339. The reversal of 148309321 is 123903841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117072400 + 31236921 = 10820^2 + 5589^2 .

It is a cyclic number.

It is not a de Polignac number, because 148309321 - 2¹⁵ = 148276553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (148309351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74154660 + 74154661.

It is an arithmetic number, because the mean of its divisors is an integer number (74154661).

Almost surely, 2^148309321 is an apocalyptic number.

It is an amenable number.

148309321 is a deficient number, since it is larger than the sum of its proper divisors (1).

148309321 is an equidigital number, since it uses as much as digits as its factorization.

148309321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 148309321 is about 12178.2314397453. The cubic root of 148309321 is about 529.3254989126.

The spelling of 148309321 in words is "one hundred forty-eight million, three hundred nine thousand, three hundred twenty-one".