91389367 has 2 divisors, whose sum is σ = 91389368. Its totient is φ = 91389366.

The previous prime is 91389359. The next prime is 91389409. The reversal of 91389367 is 76398319.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91389367 - 2³ = 91389359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91389317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45694683 + 45694684.

It is an arithmetic number, because the mean of its divisors is an integer number (45694684).

Almost surely, 2^91389367 is an apocalyptic number.

91389367 is a deficient number, since it is larger than the sum of its proper divisors (1).

91389367 is an equidigital number, since it uses as much as digits as its factorization.

91389367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 91389367 is about 9559.7786062231. The cubic root of 91389367 is about 450.4347518608.

The spelling of 91389367 in words is "ninety-one million, three hundred eighty-nine thousand, three hundred sixty-seven".