91026481 has 8 divisors (see below), whose sum is σ = 112032704. Its totient is φ = 72020880.

The previous prime is 91026469. The next prime is 91026497. The reversal of 91026481 is 18462019.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91026481 is a prime.

It is a super-2 number, since 2×91026481² = 16571640486486722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91026181) 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, 500055 + ... + 500236.

It is an arithmetic number, because the mean of its divisors is an integer number (14004088).

Almost surely, 2^91026481 is an apocalyptic number.

91026481 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

91026481 is a deficient number, since it is larger than the sum of its proper divisors (21006223).

91026481 is a wasteful number, since it uses less digits than its factorization.

91026481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000311.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 91026481 is about 9540.7798947466. The cubic root of 91026481 is about 449.8377703281.

It can be divided in two parts, 9 and 1026481, that multiplied together give a palindrome (9238329).

The spelling of 91026481 in words is "ninety-one million, twenty-six thousand, four hundred eighty-one".