91820467 has 4 divisors (see below), whose sum is σ = 94986720. Its totient is φ = 88654216.

The previous prime is 91820459. The next prime is 91820489. The reversal of 91820467 is 76402819.

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

It is a cyclic number.

It is not a de Polignac number, because 91820467 - 2³ = 91820459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91820497) 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, 1583083 + ... + 1583140.

It is an arithmetic number, because the mean of its divisors is an integer number (23746680).

Almost surely, 2^91820467 is an apocalyptic number.

91820467 is a deficient number, since it is larger than the sum of its proper divisors (3166253).

91820467 is a wasteful number, since it uses less digits than its factorization.

91820467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166252.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 91820467 is about 9582.2996717907. The cubic root of 91820467 is about 451.1419015525.

The spelling of 91820467 in words is "ninety-one million, eight hundred twenty thousand, four hundred sixty-seven".