91949439 has 16 divisors (see below), whose sum is σ = 124297472. Its totient is φ = 60455808.

The previous prime is 91949419. The next prime is 91949461. The reversal of 91949439 is 93494919.

It is not a de Polignac number, because 91949439 - 2¹¹ = 91947391 is a prime.

It is a super-3 number, since 3×91949439³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91949419) 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 15 ways as a sum of consecutive naturals, for example, 103692 + ... + 104574.

It is an arithmetic number, because the mean of its divisors is an integer number (7768592).

Almost surely, 2^91949439 is an apocalyptic number.

91949439 is a deficient number, since it is larger than the sum of its proper divisors (32348033).

91949439 is a wasteful number, since it uses less digits than its factorization.

91949439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326.

The product of its digits is 314928, while the sum is 48.

The square root of 91949439 is about 9589.0270100777. The cubic root of 91949439 is about 451.3530289631.

The spelling of 91949439 in words is "ninety-one million, nine hundred forty-nine thousand, four hundred thirty-nine".