91370047 has 2 divisors, whose sum is σ = 91370048. Its totient is φ = 91370046.

The previous prime is 91370003. The next prime is 91370077. The reversal of 91370047 is 74007319.

It is a strong prime.

It is an emirp because it is prime and its reverse (74007319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91370047 - 2⁷ = 91369919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91370077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45685023 + 45685024.

It is an arithmetic number, because the mean of its divisors is an integer number (45685024).

Almost surely, 2^91370047 is an apocalyptic number.

91370047 is a deficient number, since it is larger than the sum of its proper divisors (1).

91370047 is an equidigital number, since it uses as much as digits as its factorization.

91370047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 91370047 is about 9558.7680691604. The cubic root of 91370047 is about 450.4030085154.

The spelling of 91370047 in words is "ninety-one million, three hundred seventy thousand, forty-seven".