49191389 has 16 divisors (see below), whose sum is σ = 56179200. Its totient is φ = 42742080.

The previous prime is 49191379. The next prime is 49191391. The reversal of 49191389 is 98319194.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49191389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49191379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13262 + ... + 16560.

It is an arithmetic number, because the mean of its divisors is an integer number (3511200).

Almost surely, 2^49191389 is an apocalyptic number.

It is an amenable number.

49191389 is a deficient number, since it is larger than the sum of its proper divisors (6987811).

49191389 is a wasteful number, since it uses less digits than its factorization.

49191389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380.

The product of its digits is 69984, while the sum is 44.

The square root of 49191389 is about 7013.6573198296. The cubic root of 49191389 is about 366.4063812071.

The spelling of 49191389 in words is "forty-nine million, one hundred ninety-one thousand, three hundred eighty-nine".