93791891 has 2 divisors, whose sum is σ = 93791892. Its totient is φ = 93791890.

The previous prime is 93791879. The next prime is 93791917. The reversal of 93791891 is 19819739.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93791891 is a prime.

It is not a weakly prime, because it can be changed into another prime (93791851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46895945 + 46895946.

It is an arithmetic number, because the mean of its divisors is an integer number (46895946).

Almost surely, 2^93791891 is an apocalyptic number.

93791891 is a deficient number, since it is larger than the sum of its proper divisors (1).

93791891 is an equidigital number, since it uses as much as digits as its factorization.

93791891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 47.

The square root of 93791891 is about 9684.6213658563. The cubic root of 93791891 is about 454.3478012424.

The spelling of 93791891 in words is "ninety-three million, seven hundred ninety-one thousand, eight hundred ninety-one".