47109491 has 16 divisors (see below), whose sum is σ = 57136128. Its totient is φ = 38253600.

The previous prime is 47109487. The next prime is 47109511. The reversal of 47109491 is 19490174.

It is not a de Polignac number, because 47109491 - 2² = 47109487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47109401) 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, 881 + ... + 9746.

It is an arithmetic number, because the mean of its divisors is an integer number (3571008).

Almost surely, 2^47109491 is an apocalyptic number.

47109491 is a deficient number, since it is larger than the sum of its proper divisors (10026637).

47109491 is a wasteful number, since it uses less digits than its factorization.

47109491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10682.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 47109491 is about 6863.6354069837. The cubic root of 47109491 is about 361.1626275449.

The spelling of 47109491 in words is "forty-seven million, one hundred nine thousand, four hundred ninety-one".