91662473 has 4 divisors (see below), whose sum is σ = 104757120. Its totient is φ = 78567828.

The previous prime is 91662457. The next prime is 91662497. The reversal of 91662473 is 37426619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37426619 = 137 ⋅273187.

It is a cyclic number.

It is not a de Polignac number, because 91662473 - 2⁴ = 91662457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91662073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6547313 + ... + 6547326.

It is an arithmetic number, because the mean of its divisors is an integer number (26189280).

Almost surely, 2^91662473 is an apocalyptic number.

It is an amenable number.

91662473 is a deficient number, since it is larger than the sum of its proper divisors (13094647).

91662473 is a wasteful number, since it uses less digits than its factorization.

91662473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094646.

The product of its digits is 54432, while the sum is 38.

The square root of 91662473 is about 9574.0520679595. The cubic root of 91662473 is about 450.8829954604.

The spelling of 91662473 in words is "ninety-one million, six hundred sixty-two thousand, four hundred seventy-three".