91541420 has 12 divisors (see below), whose sum is σ = 192237024. Its totient is φ = 36616560.

The previous prime is 91541407. The next prime is 91541423. The reversal of 91541420 is 2414519.

It is a self number, because there is not a number n which added to its sum of digits gives 91541420.

It is not an unprimeable number, because it can be changed into a prime (91541423) 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, 2288516 + ... + 2288555.

It is an arithmetic number, because the mean of its divisors is an integer number (16019752).

Almost surely, 2^91541420 is an apocalyptic number.

It is an amenable number.

91541420 is an abundant number, since it is smaller than the sum of its proper divisors (100695604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91541420 is a wasteful number, since it uses less digits than its factorization.

91541420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577080 (or 4577078 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 91541420 is about 9567.7280479746. The cubic root of 91541420 is about 450.6844235249.

Adding to 91541420 its reverse (2414519), we get a palindrome (93955939).

The spelling of 91541420 in words is "ninety-one million, five hundred forty-one thousand, four hundred twenty".