91654981 has 8 divisors (see below), whose sum is σ = 100548000. Its totient is φ = 82855440.

The previous prime is 91654963. The next prime is 91654987. The reversal of 91654981 is 18945619.

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

It is a cyclic number.

It is not a de Polignac number, because 91654981 - 2⁵ = 91654949 is a prime.

It is a super-2 number, since 2×91654981² = 16801271084220722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91654987) 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, 21306 + ... + 25243.

It is an arithmetic number, because the mean of its divisors is an integer number (12568500).

Almost surely, 2^91654981 is an apocalyptic number.

It is an amenable number.

91654981 is a deficient number, since it is larger than the sum of its proper divisors (8893019).

91654981 is a wasteful number, since it uses less digits than its factorization.

91654981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46739.

The product of its digits is 77760, while the sum is 43.

The square root of 91654981 is about 9573.6607940745. The cubic root of 91654981 is about 450.8707108714.

The spelling of 91654981 in words is "ninety-one million, six hundred fifty-four thousand, nine hundred eighty-one".