91700690 has 16 divisors (see below), whose sum is σ = 167768280. Its totient is φ = 36078720.

The previous prime is 91700683. The next prime is 91700699. The reversal of 91700690 is 9600719.

It can be written as a sum of positive squares in 4 ways, for example, as 64754209 + 26946481 = 8047^2 + 5191^2 .

It is a super-3 number, since 3×91700690³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91700699) 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, 74555 + ... + 75774.

Almost surely, 2^91700690 is an apocalyptic number.

91700690 is a deficient number, since it is larger than the sum of its proper divisors (76067590).

91700690 is a wasteful number, since it uses less digits than its factorization.

91700690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150397.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 91700690 is about 9576.0477233564. The cubic root of 91700690 is about 450.9456492403.

The spelling of 91700690 in words is "ninety-one million, seven hundred thousand, six hundred ninety".