91438029 has 24 divisors (see below), whose sum is σ = 135014880. Its totient is φ = 59618592.

The previous prime is 91438021. The next prime is 91438031. The reversal of 91438029 is 92083419.

It is not a de Polignac number, because 91438029 - 2³ = 91438021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91437984 and 91438002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91438021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80862 + ... + 81984.

It is an arithmetic number, because the mean of its divisors is an integer number (5625620).

Almost surely, 2^91438029 is an apocalyptic number.

It is an amenable number.

91438029 is a deficient number, since it is larger than the sum of its proper divisors (43576851).

91438029 is a wasteful number, since it uses less digits than its factorization.

91438029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 91438029 is about 9562.3234101342. The cubic root of 91438029 is about 450.5146851811.

The spelling of 91438029 in words is "ninety-one million, four hundred thirty-eight thousand, twenty-nine".