49439491 has 2 divisors, whose sum is σ = 49439492. Its totient is φ = 49439490.

The previous prime is 49439483. The next prime is 49439521. The reversal of 49439491 is 19493494.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49439491 - 2³ = 49439483 is a prime.

It is not a weakly prime, because it can be changed into another prime (49439431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24719745 + 24719746.

It is an arithmetic number, because the mean of its divisors is an integer number (24719746).

Almost surely, 2^49439491 is an apocalyptic number.

49439491 is a deficient number, since it is larger than the sum of its proper divisors (1).

49439491 is an equidigital number, since it uses as much as digits as its factorization.

49439491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 49439491 is about 7031.3221374077. The cubic root of 49439491 is about 367.0213516522.

The spelling of 49439491 in words is "forty-nine million, four hundred thirty-nine thousand, four hundred ninety-one".