253919321 has 2 divisors, whose sum is σ = 253919322. Its totient is φ = 253919320.

The previous prime is 253919317. The next prime is 253919383. The reversal of 253919321 is 123919352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239135296 + 14784025 = 15464^2 + 3845^2 .

It is a cyclic number.

It is not a de Polignac number, because 253919321 - 2² = 253919317 is a prime.

It is not a weakly prime, because it can be changed into another prime (253919921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126959660 + 126959661.

It is an arithmetic number, because the mean of its divisors is an integer number (126959661).

Almost surely, 2^253919321 is an apocalyptic number.

It is an amenable number.

253919321 is a deficient number, since it is larger than the sum of its proper divisors (1).

253919321 is an equidigital number, since it uses as much as digits as its factorization.

253919321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 253919321 is about 15934.8461241394. The cubic root of 253919321 is about 633.2354932578.

The spelling of 253919321 in words is "two hundred fifty-three million, nine hundred nineteen thousand, three hundred twenty-one".