91670435 has 4 divisors (see below), whose sum is σ = 110004528. Its totient is φ = 73336344.

The previous prime is 91670419. The next prime is 91670461. The reversal of 91670435 is 53407619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91670435 - 2⁴ = 91670419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91670395 and 91670404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9167039 + ... + 9167048.

It is an arithmetic number, because the mean of its divisors is an integer number (27501132).

Almost surely, 2^91670435 is an apocalyptic number.

91670435 is a deficient number, since it is larger than the sum of its proper divisors (18334093).

91670435 is a wasteful number, since it uses less digits than its factorization.

91670435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18334092.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 91670435 is about 9574.4678703310. The cubic root of 91670435 is about 450.8960499721.

The spelling of 91670435 in words is "ninety-one million, six hundred seventy thousand, four hundred thirty-five".