47545891 has 4 divisors (see below), whose sum is σ = 47592952. Its totient is φ = 47498832.

The previous prime is 47545871. The next prime is 47545919. The reversal of 47545891 is 19854574.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47545891 - 2⁵ = 47545859 is a prime.

It is a super-2 number, since 2×47545891² = 4521223501967762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47545871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21981 + ... + 24046.

It is an arithmetic number, because the mean of its divisors is an integer number (11898238).

Almost surely, 2^47545891 is an apocalyptic number.

47545891 is a deficient number, since it is larger than the sum of its proper divisors (47061).

47545891 is a wasteful number, since it uses less digits than its factorization.

47545891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47060.

The product of its digits is 201600, while the sum is 43.

The square root of 47545891 is about 6895.3528553657. The cubic root of 47545891 is about 362.2744146999.

The spelling of 47545891 in words is "forty-seven million, five hundred forty-five thousand, eight hundred ninety-one".