49871519 has 2 divisors, whose sum is σ = 49871520. Its totient is φ = 49871518.

The previous prime is 49871513. The next prime is 49871527. The reversal of 49871519 is 91517894.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49871519 - 2¹⁶ = 49805983 is a prime.

It is a super-2 number, since 2×49871519² = 4974336814734722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49871519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49871513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24935759 + 24935760.

It is an arithmetic number, because the mean of its divisors is an integer number (24935760).

Almost surely, 2^49871519 is an apocalyptic number.

49871519 is a deficient number, since it is larger than the sum of its proper divisors (1).

49871519 is an equidigital number, since it uses as much as digits as its factorization.

49871519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The square root of 49871519 is about 7061.9769894839. The cubic root of 49871519 is about 368.0873271606.

The spelling of 49871519 in words is "forty-nine million, eight hundred seventy-one thousand, five hundred nineteen".