49199987 has 4 divisors (see below), whose sum is σ = 51789480. Its totient is φ = 46610496.

The previous prime is 49199981. The next prime is 49200017. The reversal of 49199987 is 78999194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78999194 = 2 ⋅39499597.

It is not a de Polignac number, because 49199987 - 2⁴ = 49199971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49199981) 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, 1294718 + ... + 1294755.

It is an arithmetic number, because the mean of its divisors is an integer number (12947370).

Almost surely, 2^49199987 is an apocalyptic number.

49199987 is a deficient number, since it is larger than the sum of its proper divisors (2589493).

49199987 is a wasteful number, since it uses less digits than its factorization.

49199987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589492.

The product of its digits is 1469664, while the sum is 56.

The square root of 49199987 is about 7014.2702400178. The cubic root of 49199987 is about 366.4277276161.

The spelling of 49199987 in words is "forty-nine million, one hundred ninety-nine thousand, nine hundred eighty-seven".