91794047 has 2 divisors, whose sum is σ = 91794048. Its totient is φ = 91794046.

The previous prime is 91794013. The next prime is 91794049. The reversal of 91794047 is 74049719.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91794047 - 2⁸ = 91793791 is a prime.

It is a super-2 number, since 2×91794047² = 16852294129276418, which contains 22 as substring.

Together with 91794049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91793995 and 91794013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91794049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45897023 + 45897024.

It is an arithmetic number, because the mean of its divisors is an integer number (45897024).

Almost surely, 2^91794047 is an apocalyptic number.

91794047 is a deficient number, since it is larger than the sum of its proper divisors (1).

91794047 is an equidigital number, since it uses as much as digits as its factorization.

91794047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 91794047 is about 9580.9209891325. The cubic root of 91794047 is about 451.0986275680.

The spelling of 91794047 in words is "ninety-one million, seven hundred ninety-four thousand, forty-seven".