49971691 has 16 divisors (see below), whose sum is σ = 65583360. Its totient is φ = 36888480.

The previous prime is 49971689. The next prime is 49971697. The reversal of 49971691 is 19617994.

It is a cyclic number.

It is not a de Polignac number, because 49971691 - 2¹ = 49971689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49971697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15616 + ... + 18541.

It is an arithmetic number, because the mean of its divisors is an integer number (4098960).

Almost surely, 2^49971691 is an apocalyptic number.

49971691 is a deficient number, since it is larger than the sum of its proper divisors (15611669).

49971691 is a wasteful number, since it uses less digits than its factorization.

49971691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34194.

The product of its digits is 122472, while the sum is 46.

The square root of 49971691 is about 7069.0657798609. The cubic root of 49971691 is about 368.3336092398. Note that the first 3 decimals are identical.

The spelling of 49971691 in words is "forty-nine million, nine hundred seventy-one thousand, six hundred ninety-one".