49801987 has 4 divisors (see below), whose sum is σ = 50484280. Its totient is φ = 49119696.

The previous prime is 49801981. The next prime is 49802009. The reversal of 49801987 is 78910894.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 49801987 - 2³ = 49801979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49801981) 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, 341037 + ... + 341182.

It is an arithmetic number, because the mean of its divisors is an integer number (12621070).

Almost surely, 2^49801987 is an apocalyptic number.

49801987 is a deficient number, since it is larger than the sum of its proper divisors (682293).

49801987 is an equidigital number, since it uses as much as digits as its factorization.

49801987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682292.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 49801987 is about 7057.0522883142. The cubic root of 49801987 is about 367.9161823718.

The spelling of 49801987 in words is "forty-nine million, eight hundred one thousand, nine hundred eighty-seven".