49309187 has 4 divisors (see below), whose sum is σ = 49359936. Its totient is φ = 49258440.

The previous prime is 49309181. The next prime is 49309207. The reversal of 49309187 is 78190394.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78190394 = 2 ⋅39095197.

It is a cyclic number.

It is not a de Polignac number, because 49309187 - 2¹⁸ = 49047043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49309181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23888 + ... + 25869.

It is an arithmetic number, because the mean of its divisors is an integer number (12339984).

Almost surely, 2^49309187 is an apocalyptic number.

49309187 is a deficient number, since it is larger than the sum of its proper divisors (50749).

49309187 is an equidigital number, since it uses as much as digits as its factorization.

49309187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50748.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 49309187 is about 7022.0500567854. The cubic root of 49309187 is about 366.6986243037.

The spelling of 49309187 in words is "forty-nine million, three hundred nine thousand, one hundred eighty-seven".