47891311 has 16 divisors (see below), whose sum is σ = 53659648. Its totient is φ = 42444000.

The previous prime is 47891299. The next prime is 47891323. The reversal of 47891311 is 11319874.

It is an interprime number because it is at equal distance from previous prime (47891299) and next prime (47891323).

It is a cyclic number.

It is not a de Polignac number, because 47891311 - 2⁷ = 47891183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47891351) 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, 60460 + ... + 61246.

It is an arithmetic number, because the mean of its divisors is an integer number (3353728).

Almost surely, 2^47891311 is an apocalyptic number.

47891311 is a deficient number, since it is larger than the sum of its proper divisors (5768337).

47891311 is a wasteful number, since it uses less digits than its factorization.

47891311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982.

The product of its digits is 6048, while the sum is 34.

The square root of 47891311 is about 6920.3548319432. The cubic root of 47891311 is about 363.1496042905.

The spelling of 47891311 in words is "forty-seven million, eight hundred ninety-one thousand, three hundred eleven".