91344091 has 4 divisors (see below), whose sum is σ = 91394784. Its totient is φ = 91293400.

The previous prime is 91344089. The next prime is 91344103. The reversal of 91344091 is 19044319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91344091 - 2¹ = 91344089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91344041) 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, 22540 + ... + 26281.

It is an arithmetic number, because the mean of its divisors is an integer number (22848696).

Almost surely, 2^91344091 is an apocalyptic number.

91344091 is a deficient number, since it is larger than the sum of its proper divisors (50693).

91344091 is a wasteful number, since it uses less digits than its factorization.

91344091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50692.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 91344091 is about 9557.4102663849. The cubic root of 91344091 is about 450.3603549761.

It can be divided in two parts, 9134 and 4091, that added together give a square (13225 = 115²).

The spelling of 91344091 in words is "ninety-one million, three hundred forty-four thousand, ninety-one".