91477 has 4 divisors (see below), whose sum is σ = 96876. Its totient is φ = 86080.

The previous prime is 91463. The next prime is 91493. The reversal of 91477 is 77419.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 40401 = 226^2 + 201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2674 + ... + 2707.

It is an arithmetic number, because the mean of its divisors is an integer number (24219).

2⁹¹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

91477 is a deficient number, since it is larger than the sum of its proper divisors (5399).

91477 is a wasteful number, since it uses less digits than its factorization.

91477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5398.

The product of its digits is 1764, while the sum is 28.

The square root of 91477 is about 302.4516490284. The cubic root of 91477 is about 45.0578679394.

The spelling of 91477 in words is "ninety-one thousand, four hundred seventy-seven".