49439189 has 2 divisors, whose sum is σ = 49439190. Its totient is φ = 49439188.

The previous prime is 49439183. The next prime is 49439209. The reversal of 49439189 is 98193494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25331089 + 24108100 = 5033^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 49439189 - 2²⁰ = 48390613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49439183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24719594 + 24719595.

It is an arithmetic number, because the mean of its divisors is an integer number (24719595).

Almost surely, 2^49439189 is an apocalyptic number.

It is an amenable number.

49439189 is a deficient number, since it is larger than the sum of its proper divisors (1).

49439189 is an equidigital number, since it uses as much as digits as its factorization.

49439189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 49439189 is about 7031.3006620397. The cubic root of 49439189 is about 367.0206043368.

The spelling of 49439189 in words is "forty-nine million, four hundred thirty-nine thousand, one hundred eighty-nine".