91056547 has 2 divisors, whose sum is σ = 91056548. Its totient is φ = 91056546.

The previous prime is 91056509. The next prime is 91056557. The reversal of 91056547 is 74565019.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91056547 is a prime.

It is not a weakly prime, because it can be changed into another prime (91056557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45528273 + 45528274.

It is an arithmetic number, because the mean of its divisors is an integer number (45528274).

Almost surely, 2^91056547 is an apocalyptic number.

91056547 is a deficient number, since it is larger than the sum of its proper divisors (1).

91056547 is an equidigital number, since it uses as much as digits as its factorization.

91056547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 91056547 is about 9542.3554220119. The cubic root of 91056547 is about 449.8872919378.

The spelling of 91056547 in words is "ninety-one million, fifty-six thousand, five hundred forty-seven".