49985869 has 2 divisors, whose sum is σ = 49985870. Its totient is φ = 49985868.

The previous prime is 49985867. The next prime is 49985893. The reversal of 49985869 is 96858994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 10484644 = 6285^2 + 3238^2 .

It is a cyclic number.

It is not a de Polignac number, because 49985869 - 2¹ = 49985867 is a prime.

It is a super-2 number, since 2×49985869² = 4997174199370322, which contains 22 as substring.

Together with 49985867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49985861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24992934 + 24992935.

It is an arithmetic number, because the mean of its divisors is an integer number (24992935).

Almost surely, 2^49985869 is an apocalyptic number.

It is an amenable number.

49985869 is a deficient number, since it is larger than the sum of its proper divisors (1).

49985869 is an equidigital number, since it uses as much as digits as its factorization.

49985869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 58.

The square root of 49985869 is about 7070.0685286636. The cubic root of 49985869 is about 368.3684405612.

It can be divided in two parts, 499 and 85869, that added together give a palindrome (86368).

The spelling of 49985869 in words is "forty-nine million, nine hundred eighty-five thousand, eight hundred sixty-nine".