495871889 has 2 divisors, whose sum is σ = 495871890. Its totient is φ = 495871888.

The previous prime is 495871837. The next prime is 495871907. The reversal of 495871889 is 988178594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457617664 + 38254225 = 21392^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 495871889 - 2¹² = 495867793 is a prime.

It is not a weakly prime, because it can be changed into another prime (495871289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247935944 + 247935945.

It is an arithmetic number, because the mean of its divisors is an integer number (247935945).

Almost surely, 2^495871889 is an apocalyptic number.

It is an amenable number.

495871889 is a deficient number, since it is larger than the sum of its proper divisors (1).

495871889 is an equidigital number, since it uses as much as digits as its factorization.

495871889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 59.

The square root of 495871889 is about 22268.1810887194. The cubic root of 495871889 is about 791.5101642596.

The spelling of 495871889 in words is "four hundred ninety-five million, eight hundred seventy-one thousand, eight hundred eighty-nine".