91523541 has 8 divisors (see below), whose sum is σ = 123853024. Its totient is φ = 60104880.

The previous prime is 91523539. The next prime is 91523557. The reversal of 91523541 is 14532519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91523541 - 2¹ = 91523539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91523499 and 91523508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91523591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227470 + ... + 227871.

It is an arithmetic number, because the mean of its divisors is an integer number (15481628).

Almost surely, 2^91523541 is an apocalyptic number.

It is an amenable number.

91523541 is a deficient number, since it is larger than the sum of its proper divisors (32329483).

91523541 is a wasteful number, since it uses less digits than its factorization.

91523541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455411.

The product of its digits is 5400, while the sum is 30.

The square root of 91523541 is about 9566.7936635008. The cubic root of 91523541 is about 450.6550804820.

The spelling of 91523541 in words is "ninety-one million, five hundred twenty-three thousand, five hundred forty-one".