47169091 has 4 divisors (see below), whose sum is σ = 47187000. Its totient is φ = 47151184.

The previous prime is 47169053. The next prime is 47169107. The reversal of 47169091 is 19096174.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47169091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47169091.

It is not an unprimeable number, because it can be changed into a prime (47169041) 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, 4141 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (11796750).

Almost surely, 2^47169091 is an apocalyptic number.

47169091 is a deficient number, since it is larger than the sum of its proper divisors (17909).

47169091 is a wasteful number, since it uses less digits than its factorization.

47169091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17908.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 47169091 is about 6867.9757570918. The cubic root of 47169091 is about 361.3148701965.

The spelling of 47169091 in words is "forty-seven million, one hundred sixty-nine thousand, ninety-one".