91970 has 16 divisors (see below), whose sum is σ = 175608. Its totient is φ = 34560.

The previous prime is 91969. The next prime is 91997. The reversal of 91970 is 7919.

It can be written as a sum of positive squares in 4 ways, for example, as 80089 + 11881 = 283^2 + 109^2 .

It is a super-3 number, since 3×91970³ = 2333779465119000, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101 + ... + 440.

2⁹¹⁹⁷⁰ is an apocalyptic number.

91970 is a deficient number, since it is larger than the sum of its proper divisors (83638).

91970 is a wasteful number, since it uses less digits than its factorization.

91970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 91970 is about 303.2655601944. The cubic root of 91970 is about 45.1386669110.

It can be divided in two parts, 919 and 70, that added together give a palindrome (989).

The spelling of 91970 in words is "ninety-one thousand, nine hundred seventy".