49681971 has 8 divisors (see below), whose sum is σ = 73602960. Its totient is φ = 33121296.

The previous prime is 49681969. The next prime is 49681981. The reversal of 49681971 is 17918694.

It is a happy number.

It is not a de Polignac number, because 49681971 - 2¹ = 49681969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49681921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920010 + ... + 920063.

It is an arithmetic number, because the mean of its divisors is an integer number (9200370).

Almost surely, 2^49681971 is an apocalyptic number.

49681971 is a deficient number, since it is larger than the sum of its proper divisors (23920989).

49681971 is a wasteful number, since it uses less digits than its factorization.

49681971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840082 (or 1840076 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 49681971 is about 7048.5438921809. The cubic root of 49681971 is about 367.6204020317.

The spelling of 49681971 in words is "forty-nine million, six hundred eighty-one thousand, nine hundred seventy-one".