253985777 has 2 divisors, whose sum is σ = 253985778. Its totient is φ = 253985776.

The previous prime is 253985747. The next prime is 253985783. The reversal of 253985777 is 777589352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208773601 + 45212176 = 14449^2 + 6724^2 .

It is a cyclic number.

It is not a de Polignac number, because 253985777 - 2²⁴ = 237208561 is a prime.

It is not a weakly prime, because it can be changed into another prime (253985717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126992888 + 126992889.

It is an arithmetic number, because the mean of its divisors is an integer number (126992889).

Almost surely, 2^253985777 is an apocalyptic number.

It is an amenable number.

253985777 is a deficient number, since it is larger than the sum of its proper divisors (1).

253985777 is an equidigital number, since it uses as much as digits as its factorization.

253985777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3704400, while the sum is 53.

The square root of 253985777 is about 15936.9312290667. The cubic root of 253985777 is about 633.2907320991.

The spelling of 253985777 in words is "two hundred fifty-three million, nine hundred eighty-five thousand, seven hundred seventy-seven".