91970446 has 16 divisors (see below), whose sum is σ = 141394176. Its totient is φ = 44846136.

The previous prime is 91970441. The next prime is 91970447. The reversal of 91970446 is 64407919.

It is a happy number.

It is a super-3 number, since 3×91970446³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91970399 and 91970408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91970441) 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 7 ways as a sum of consecutive naturals, for example, 27265 + ... + 30451.

It is an arithmetic number, because the mean of its divisors is an integer number (8837136).

Almost surely, 2^91970446 is an apocalyptic number.

91970446 is a deficient number, since it is larger than the sum of its proper divisors (49423730).

91970446 is a wasteful number, since it uses less digits than its factorization.

91970446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 91970446 is about 9590.1223141313. The cubic root of 91970446 is about 451.3873987617.

It can be divided in two parts, 91970 and 446, that added together give a square (92416 = 304²).

The spelling of 91970446 in words is "ninety-one million, nine hundred seventy thousand, four hundred forty-six".