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91445 = 518289
BaseRepresentation
bin10110010100110101
311122102212
4112110311
510411240
61543205
7530414
oct262465
9148385
1091445
1162782
1244b05
1332813
142547b
151c165
hex16535

91445 has 4 divisors (see below), whose sum is σ = 109740. Its totient is φ = 73152.

The previous prime is 91433. The next prime is 91453. The reversal of 91445 is 54419.

It is a happy number.

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 68644 + 22801 = 262^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 91445 - 26 = 91381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9140 + ... + 9149.

It is an arithmetic number, because the mean of its divisors is an integer number (27435).

291445 is an apocalyptic number.

It is an amenable number.

91445 is a deficient number, since it is larger than the sum of its proper divisors (18295).

91445 is a wasteful number, since it uses less digits than its factorization.

91445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18294.

The product of its digits is 720, while the sum is 23.

The square root of 91445 is about 302.3987433836. The cubic root of 91445 is about 45.0526133584.

It can be divided in two parts, 914 and 45, that added together give a palindrome (959).

The spelling of 91445 in words is "ninety-one thousand, four hundred forty-five".

Divisors: 1 5 18289 91445