91547543 has 2 divisors, whose sum is σ = 91547544. Its totient is φ = 91547542.

The previous prime is 91547507. The next prime is 91547549. The reversal of 91547543 is 34574519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91547543 - 2¹⁶ = 91482007 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91547497 and 91547506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91547549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45773771 + 45773772.

It is an arithmetic number, because the mean of its divisors is an integer number (45773772).

Almost surely, 2^91547543 is an apocalyptic number.

91547543 is a deficient number, since it is larger than the sum of its proper divisors (1).

91547543 is an equidigital number, since it uses as much as digits as its factorization.

91547543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 91547543 is about 9568.0480245450. The cubic root of 91547543 is about 450.6944717239.

The spelling of 91547543 in words is "ninety-one million, five hundred forty-seven thousand, five hundred forty-three".