49807993 has 4 divisors (see below), whose sum is σ = 51525540. Its totient is φ = 48090448.

The previous prime is 49807981. The next prime is 49807997. The reversal of 49807993 is 39970894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39970894 = 2 ⋅19985447.

It can be written as a sum of positive squares in 2 ways, for example, as 39841344 + 9966649 = 6312^2 + 3157^2 .

It is a cyclic number.

It is not a de Polignac number, because 49807993 - 2⁹ = 49807481 is a prime.

It is a super-3 number, since 3×49807993³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49807997) 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, 858730 + ... + 858787.

It is an arithmetic number, because the mean of its divisors is an integer number (12881385).

Almost surely, 2^49807993 is an apocalyptic number.

It is an amenable number.

49807993 is a deficient number, since it is larger than the sum of its proper divisors (1717547).

49807993 is a wasteful number, since it uses less digits than its factorization.

49807993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717546.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 49807993 is about 7057.4778072623. The cubic root of 49807993 is about 367.9309717132.

The spelling of 49807993 in words is "forty-nine million, eight hundred seven thousand, nine hundred ninety-three".