91272901 has 4 divisors (see below), whose sum is σ = 95241312. Its totient is φ = 87304492.

The previous prime is 91272899. The next prime is 91272911. The reversal of 91272901 is 10927219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91272901 - 2¹ = 91272899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91272911) 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, 1984171 + ... + 1984216.

It is an arithmetic number, because the mean of its divisors is an integer number (23810328).

Almost surely, 2^91272901 is an apocalyptic number.

It is an amenable number.

91272901 is a deficient number, since it is larger than the sum of its proper divisors (3968411).

91272901 is a wasteful number, since it uses less digits than its factorization.

91272901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968410.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 91272901 is about 9553.6852051970. The cubic root of 91272901 is about 450.2433268393.

The spelling of 91272901 in words is "ninety-one million, two hundred seventy-two thousand, nine hundred one".