49665439 has 2 divisors, whose sum is σ = 49665440. Its totient is φ = 49665438.

The previous prime is 49665431. The next prime is 49665461. The reversal of 49665439 is 93456694.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49665439 - 2³ = 49665431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49665431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24832719 + 24832720.

It is an arithmetic number, because the mean of its divisors is an integer number (24832720).

Almost surely, 2^49665439 is an apocalyptic number.

49665439 is a deficient number, since it is larger than the sum of its proper divisors (1).

49665439 is an equidigital number, since it uses as much as digits as its factorization.

49665439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 46.

The square root of 49665439 is about 7047.3710701225. The cubic root of 49665439 is about 367.5796214790.

The spelling of 49665439 in words is "forty-nine million, six hundred sixty-five thousand, four hundred thirty-nine".