91280741 has 4 divisors (see below), whose sum is σ = 91325292. Its totient is φ = 91236192.

The previous prime is 91280713. The next prime is 91280743. The reversal of 91280741 is 14708219.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27520516 + 63760225 = 5246^2 + 7985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91280741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91280698 and 91280707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91280743) 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, 19046 + ... + 23351.

It is an arithmetic number, because the mean of its divisors is an integer number (22831323).

Almost surely, 2^91280741 is an apocalyptic number.

It is an amenable number.

91280741 is a deficient number, since it is larger than the sum of its proper divisors (44551).

91280741 is a wasteful number, since it uses less digits than its factorization.

91280741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44550.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 91280741 is about 9554.0955092568. The cubic root of 91280741 is about 450.2562178748.

The spelling of 91280741 in words is "ninety-one million, two hundred eighty thousand, seven hundred forty-one".