91641261 has 8 divisors (see below), whose sum is σ = 122252544. Its totient is φ = 61062080.

The previous prime is 91641259. The next prime is 91641281. The reversal of 91641261 is 16214619.

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 not a de Polignac number, because 91641261 - 2¹ = 91641259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91641241) 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, 300 + ... + 13541.

It is an arithmetic number, because the mean of its divisors is an integer number (15281568).

Almost surely, 2^91641261 is an apocalyptic number.

It is an amenable number.

91641261 is a deficient number, since it is larger than the sum of its proper divisors (30611283).

91641261 is a wasteful number, since it uses less digits than its factorization.

91641261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16051.

The product of its digits is 2592, while the sum is 30.

The square root of 91641261 is about 9572.9442179509. The cubic root of 91641261 is about 450.8482125311.

The spelling of 91641261 in words is "ninety-one million, six hundred forty-one thousand, two hundred sixty-one".