253921819 has 2 divisors, whose sum is σ = 253921820. Its totient is φ = 253921818.

The previous prime is 253921793. The next prime is 253921873. The reversal of 253921819 is 918129352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253921819 - 2¹⁹ = 253397531 is a prime.

It is a super-2 number, since 2×253921819² = 128952580328537522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253921919) 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, 126960909 + 126960910.

It is an arithmetic number, because the mean of its divisors is an integer number (126960910).

Almost surely, 2^253921819 is an apocalyptic number.

253921819 is a deficient number, since it is larger than the sum of its proper divisors (1).

253921819 is an equidigital number, since it uses as much as digits as its factorization.

253921819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 253921819 is about 15934.9245056260. The cubic root of 253921819 is about 633.2375697928.

The spelling of 253921819 in words is "two hundred fifty-three million, nine hundred twenty-one thousand, eight hundred nineteen".