49921187 has 4 divisors (see below), whose sum is σ = 50180040. Its totient is φ = 49662336.

The previous prime is 49921141. The next prime is 49921199. The reversal of 49921187 is 78112994.

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-49921187 is a prime.

It is a super-2 number, since 2×49921187² = 4984249822977938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49921117) 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, 129137 + ... + 129522.

It is an arithmetic number, because the mean of its divisors is an integer number (12545010).

Almost surely, 2^49921187 is an apocalyptic number.

49921187 is a deficient number, since it is larger than the sum of its proper divisors (258853).

49921187 is a wasteful number, since it uses less digits than its factorization.

49921187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258852.

The product of its digits is 36288, while the sum is 41.

The square root of 49921187 is about 7065.4926933654. The cubic root of 49921187 is about 368.2094816882.

The spelling of 49921187 in words is "forty-nine million, nine hundred twenty-one thousand, one hundred eighty-seven".