91672543 has 4 divisors (see below), whose sum is σ = 91713888. Its totient is φ = 91631200.

The previous prime is 91672541. The next prime is 91672547. The reversal of 91672543 is 34527619.

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 91672543 - 2¹ = 91672541 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 (91672541) 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, 17146 + ... + 21847.

It is an arithmetic number, because the mean of its divisors is an integer number (22928472).

Almost surely, 2^91672543 is an apocalyptic number.

91672543 is a deficient number, since it is larger than the sum of its proper divisors (41345).

91672543 is a wasteful number, since it uses less digits than its factorization.

91672543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41344.

The product of its digits is 45360, while the sum is 37.

The square root of 91672543 is about 9574.5779541450. The cubic root of 91672543 is about 450.8995061267.

The spelling of 91672543 in words is "ninety-one million, six hundred seventy-two thousand, five hundred forty-three".