91397443 has 2 divisors, whose sum is σ = 91397444. Its totient is φ = 91397442.

The previous prime is 91397441. The next prime is 91397461. The reversal of 91397443 is 34479319.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91397443 - 2¹ = 91397441 is a prime.

Together with 91397441, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 91397396 and 91397405.

It is not a weakly prime, because it can be changed into another prime (91397441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45698721 + 45698722.

It is an arithmetic number, because the mean of its divisors is an integer number (45698722).

Almost surely, 2^91397443 is an apocalyptic number.

91397443 is a deficient number, since it is larger than the sum of its proper divisors (1).

91397443 is an equidigital number, since it uses as much as digits as its factorization.

91397443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 91397443 is about 9560.2009916110. The cubic root of 91397443 is about 450.4480196476.

The spelling of 91397443 in words is "ninety-one million, three hundred ninety-seven thousand, four hundred forty-three".