49999865 has 4 divisors (see below), whose sum is σ = 59999844. Its totient is φ = 39999888.

The previous prime is 49999853. The next prime is 49999877. The reversal of 49999865 is 56899994.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (49999853) and next prime (49999877).

It can be written as a sum of positive squares in 2 ways, for example, as 36772096 + 13227769 = 6064^2 + 3637^2 .

It is a cyclic number.

It is not a de Polignac number, because 49999865 - 2⁶ = 49999801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4999982 + ... + 4999991.

It is an arithmetic number, because the mean of its divisors is an integer number (14999961).

Almost surely, 2^49999865 is an apocalyptic number.

It is an amenable number.

49999865 is a deficient number, since it is larger than the sum of its proper divisors (9999979).

49999865 is an equidigital number, since it uses as much as digits as its factorization.

49999865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9999978.

The product of its digits is 6298560, while the sum is 59.

The square root of 49999865 is about 7071.0582659175. The cubic root of 49999865 is about 368.4028183009.

The spelling of 49999865 in words is "forty-nine million, nine hundred ninety-nine thousand, eight hundred sixty-five".