49993989 has 4 divisors (see below), whose sum is σ = 66658656. Its totient is φ = 33329324.

The previous prime is 49993987. The next prime is 49994003. The reversal of 49993989 is 98939994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49993989 - 2¹ = 49993987 is a prime.

It is a super-2 number, since 2×49993989² = 4998797872264242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49993987) 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, 8332329 + ... + 8332334.

It is an arithmetic number, because the mean of its divisors is an integer number (16664664).

Almost surely, 2^49993989 is an apocalyptic number.

It is an amenable number.

49993989 is a deficient number, since it is larger than the sum of its proper divisors (16664667).

49993989 is a wasteful number, since it uses less digits than its factorization.

49993989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16664666.

The product of its digits is 5668704, while the sum is 60.

The square root of 49993989 is about 7070.6427572039. The cubic root of 49993989 is about 368.3883861302.

The spelling of 49993989 in words is "forty-nine million, nine hundred ninety-three thousand, nine hundred eighty-nine".