91272649 has 8 divisors (see below), whose sum is σ = 101464832. Its totient is φ = 81533520.

The previous prime is 91272647. The next prime is 91272659. The reversal of 91272649 is 94627219.

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 91272649 - 2¹ = 91272647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91272647) 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, 112839 + ... + 113644.

It is an arithmetic number, because the mean of its divisors is an integer number (12683104).

Almost surely, 2^91272649 is an apocalyptic number.

It is an amenable number.

91272649 is a deficient number, since it is larger than the sum of its proper divisors (10192183).

91272649 is a wasteful number, since it uses less digits than its factorization.

91272649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226527.

The product of its digits is 54432, while the sum is 40.

The square root of 91272649 is about 9553.6720165599. The cubic root of 91272649 is about 450.2429124723.

The spelling of 91272649 in words is "ninety-one million, two hundred seventy-two thousand, six hundred forty-nine".