91474547 has 2 divisors, whose sum is σ = 91474548. Its totient is φ = 91474546.

The previous prime is 91474507. The next prime is 91474553. The reversal of 91474547 is 74547419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91474547 - 2¹⁴ = 91458163 is a prime.

It is not a weakly prime, because it can be changed into another prime (91474507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45737273 + 45737274.

It is an arithmetic number, because the mean of its divisors is an integer number (45737274).

Almost surely, 2^91474547 is an apocalyptic number.

91474547 is a deficient number, since it is larger than the sum of its proper divisors (1).

91474547 is an equidigital number, since it uses as much as digits as its factorization.

91474547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 91474547 is about 9564.2326926942. The cubic root of 91474547 is about 450.5746518631.

The spelling of 91474547 in words is "ninety-one million, four hundred seventy-four thousand, five hundred forty-seven".