91516473 has 28 divisors (see below), whose sum is σ = 140183808. Its totient is φ = 59690520.

The previous prime is 91516463. The next prime is 91516487. The reversal of 91516473 is 37461519.

91516473 is a `hidden beast` number, since 9 + 1 + 5 + 1 + 647 + 3 = 666.

It is not a de Polignac number, because 91516473 - 2⁵ = 91516441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91516463) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 32928 + ... + 35598.

Almost surely, 2^91516473 is an apocalyptic number.

It is an amenable number.

91516473 is a deficient number, since it is larger than the sum of its proper divisors (48667335).

91516473 is an equidigital number, since it uses as much as digits as its factorization.

91516473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2721 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 91516473 is about 9566.4242536070. The cubic root of 91516473 is about 450.6434794153.

It can be divided in two parts, 915 and 16473, that multiplied together give a triangular number (15072795 = T₅₄₉₀).

The spelling of 91516473 in words is "ninety-one million, five hundred sixteen thousand, four hundred seventy-three".