91764347 has 2 divisors, whose sum is σ = 91764348. Its totient is φ = 91764346.

The previous prime is 91764311. The next prime is 91764353. The reversal of 91764347 is 74346719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91764347 - 2¹⁰ = 91763323 is a prime.

It is not a weakly prime, because it can be changed into another prime (91164347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45882173 + 45882174.

It is an arithmetic number, because the mean of its divisors is an integer number (45882174).

Almost surely, 2^91764347 is an apocalyptic number.

91764347 is a deficient number, since it is larger than the sum of its proper divisors (1).

91764347 is an equidigital number, since it uses as much as digits as its factorization.

91764347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 91764347 is about 9579.3709083635. The cubic root of 91764347 is about 451.0499712739.

The spelling of 91764347 in words is "ninety-one million, seven hundred sixty-four thousand, three hundred forty-seven".