49571999 has 4 divisors (see below), whose sum is σ = 50169336. Its totient is φ = 48974664.

The previous prime is 49571953. The next prime is 49572023. The reversal of 49571999 is 99917594.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49571999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49571999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49571909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298544 + ... + 298709.

It is an arithmetic number, because the mean of its divisors is an integer number (12542334).

Almost surely, 2^49571999 is an apocalyptic number.

49571999 is a deficient number, since it is larger than the sum of its proper divisors (597337).

49571999 is an equidigital number, since it uses as much as digits as its factorization.

49571999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597336.

The product of its digits is 918540, while the sum is 53.

The square root of 49571999 is about 7040.7385266036. The cubic root of 49571999 is about 367.3489567024.

Subtracting 49571999 from its reverse (99917594), we obtain a triangular number (50345595 = T₁₀₀₃₄).

The spelling of 49571999 in words is "forty-nine million, five hundred seventy-one thousand, nine hundred ninety-nine".