91429 has 6 divisors (see below), whose sum is σ = 99186. Its totient is φ = 84240.

The previous prime is 91423. The next prime is 91433. The reversal of 91429 is 92419.

It can be written as a sum of positive squares in 3 ways, for example, as 225 + 91204 = 15^2 + 302^2 .

It is not a de Polignac number, because 91429 - 2⁵ = 91397 is a prime.

It is a Duffinian number.

91429 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102 + ... + 439.

It is an arithmetic number, because the mean of its divisors is an integer number (16531).

2⁹¹⁴²⁹ is an apocalyptic number.

It is an amenable number.

91429 is a deficient number, since it is larger than the sum of its proper divisors (7757).

91429 is a wasteful number, since it uses less digits than its factorization.

91429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 554 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The square root of 91429 is about 302.3722870899. The cubic root of 91429 is about 45.0499856081.

Subtracting 91429 from its reverse (92419), we obtain a triangular number (990 = T₄₄).

The spelling of 91429 in words is "ninety-one thousand, four hundred twenty-nine".