91432543 has 2 divisors, whose sum is σ = 91432544. Its totient is φ = 91432542.

The previous prime is 91432499. The next prime is 91432559. The reversal of 91432543 is 34523419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91432543 - 2⁹ = 91432031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91432043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45716271 + 45716272.

It is an arithmetic number, because the mean of its divisors is an integer number (45716272).

Almost surely, 2^91432543 is an apocalyptic number.

91432543 is a deficient number, since it is larger than the sum of its proper divisors (1).

91432543 is an equidigital number, since it uses as much as digits as its factorization.

91432543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 91432543 is about 9562.0365508609. The cubic root of 91432543 is about 450.5056751699.

The spelling of 91432543 in words is "ninety-one million, four hundred thirty-two thousand, five hundred forty-three".