91973441 has 6 divisors (see below), whose sum is σ = 106989570. Its totient is φ = 78834336.

The previous prime is 91973419. The next prime is 91973449. The reversal of 91973441 is 14437919.

It can be written as a sum of positive squares in only one way, i.e., 65141041 + 26832400 = 8071^2 + 5180^2 .

It is not a de Polignac number, because 91973441 - 2²⁶ = 24864577 is a prime.

It is a super-2 number, since 2×91973441² = 16918227698760962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91973395 and 91973404.

It is not an unprimeable number, because it can be changed into a prime (91973449) 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, 938456 + ... + 938553.

It is an arithmetic number, because the mean of its divisors is an integer number (17831595).

Almost surely, 2^91973441 is an apocalyptic number.

It is an amenable number.

91973441 is a deficient number, since it is larger than the sum of its proper divisors (15016129).

91973441 is a wasteful number, since it uses less digits than its factorization.

91973441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877023 (or 1877016 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 91973441 is about 9590.2784631104. The cubic root of 91973441 is about 451.3922984900.

The spelling of 91973441 in words is "ninety-one million, nine hundred seventy-three thousand, four hundred forty-one".