49989691 has 2 divisors, whose sum is σ = 49989692. Its totient is φ = 49989690.

The previous prime is 49989671. The next prime is 49989727. The reversal of 49989691 is 19698994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49989691 - 2⁵ = 49989659 is a prime.

It is not a weakly prime, because it can be changed into another prime (49989631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24994845 + 24994846.

It is an arithmetic number, because the mean of its divisors is an integer number (24994846).

Almost surely, 2^49989691 is an apocalyptic number.

49989691 is a deficient number, since it is larger than the sum of its proper divisors (1).

49989691 is an equidigital number, since it uses as much as digits as its factorization.

49989691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 55.

The square root of 49989691 is about 7070.3388179068. The cubic root of 49989691 is about 368.3778290033.

The spelling of 49989691 in words is "forty-nine million, nine hundred eighty-nine thousand, six hundred ninety-one".