49999665 has 8 divisors (see below), whose sum is σ = 79999488. Its totient is φ = 26666480.

The previous prime is 49999643. The next prime is 49999667. The reversal of 49999665 is 56699994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49999665 - 2⁸ = 49999409 is a prime.

It is a super-2 number, since 2×49999665² = 4999933000224450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49999667) 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 in 7 ways as a sum of consecutive naturals, for example, 1666641 + ... + 1666670.

It is an arithmetic number, because the mean of its divisors is an integer number (9999936).

Almost surely, 2^49999665 is an apocalyptic number.

It is an amenable number.

49999665 is a deficient number, since it is larger than the sum of its proper divisors (29999823).

49999665 is a wasteful number, since it uses less digits than its factorization.

49999665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333319.

The product of its digits is 4723920, while the sum is 57.

The square root of 49999665 is about 7071.0441237486. The cubic root of 49999665 is about 368.4023270952.

The spelling of 49999665 in words is "forty-nine million, nine hundred ninety-nine thousand, six hundred sixty-five".