49913987 has 4 divisors (see below), whose sum is σ = 49928280. Its totient is φ = 49899696.

The previous prime is 49913977. The next prime is 49914019. The reversal of 49913987 is 78931994.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78931994 = 2 ⋅39465997.

It is a cyclic number.

It is not a de Polignac number, because 49913987 - 2¹² = 49909891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49913917) 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, 1964 + ... + 10182.

It is an arithmetic number, because the mean of its divisors is an integer number (12482070).

Almost surely, 2^49913987 is an apocalyptic number.

49913987 is a deficient number, since it is larger than the sum of its proper divisors (14293).

49913987 is an equidigital number, since it uses as much as digits as its factorization.

49913987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14292.

The product of its digits is 489888, while the sum is 50.

The square root of 49913987 is about 7064.9831563847. The cubic root of 49913987 is about 368.1917788791.

The spelling of 49913987 in words is "forty-nine million, nine hundred thirteen thousand, nine hundred eighty-seven".