253866973 has 2 divisors, whose sum is σ = 253866974. Its totient is φ = 253866972.

The previous prime is 253866919. The next prime is 253866983. The reversal of 253866973 is 379668352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181225444 + 72641529 = 13462^2 + 8523^2 .

It is a cyclic number.

It is not a de Polignac number, because 253866973 - 2⁹ = 253866461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253866983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126933486 + 126933487.

It is an arithmetic number, because the mean of its divisors is an integer number (126933487).

Almost surely, 2^253866973 is an apocalyptic number.

It is an amenable number.

253866973 is a deficient number, since it is larger than the sum of its proper divisors (1).

253866973 is an equidigital number, since it uses as much as digits as its factorization.

253866973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The square root of 253866973 is about 15933.2034757609. The cubic root of 253866973 is about 633.1919743300.

The spelling of 253866973 in words is "two hundred fifty-three million, eight hundred sixty-six thousand, nine hundred seventy-three".