47099891 has 2 divisors, whose sum is σ = 47099892. Its totient is φ = 47099890.

The previous prime is 47099887. The next prime is 47099903. The reversal of 47099891 is 19899074.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47099891 - 2² = 47099887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47099821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23549945 + 23549946.

It is an arithmetic number, because the mean of its divisors is an integer number (23549946).

Almost surely, 2^47099891 is an apocalyptic number.

47099891 is a deficient number, since it is larger than the sum of its proper divisors (1).

47099891 is an equidigital number, since it uses as much as digits as its factorization.

47099891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 47099891 is about 6862.9360335064. The cubic root of 47099891 is about 361.1380932335.

The spelling of 47099891 in words is "forty-seven million, ninety-nine thousand, eight hundred ninety-one".