91404241 has 4 divisors (see below), whose sum is σ = 91458484. Its totient is φ = 91350000.

The previous prime is 91404233. The next prime is 91404251. The reversal of 91404241 is 14240419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14240419 = 1873 ⋅7603.

It can be written as a sum of positive squares in 2 ways, for example, as 8065600 + 83338641 = 2840^2 + 9129^2 .

It is a cyclic number.

It is not a de Polignac number, because 91404241 - 2³ = 91404233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91404251) 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, 24510 + ... + 27991.

It is an arithmetic number, because the mean of its divisors is an integer number (22864621).

Almost surely, 2^91404241 is an apocalyptic number.

It is an amenable number.

91404241 is a deficient number, since it is larger than the sum of its proper divisors (54243).

91404241 is a wasteful number, since it uses less digits than its factorization.

91404241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54242.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 91404241 is about 9560.5565214584. The cubic root of 91404241 is about 450.4591872456.

The spelling of 91404241 in words is "ninety-one million, four hundred four thousand, two hundred forty-one".