9145691 has 4 divisors (see below), whose sum is σ = 9193272. Its totient is φ = 9098112.

The previous prime is 9145673. The next prime is 9145693. The reversal of 9145691 is 1965419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1965419 = 23 ⋅85453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9145691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9145693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23501 + ... + 23886.

It is an arithmetic number, because the mean of its divisors is an integer number (2298318).

Almost surely, 2^9145691 is an apocalyptic number.

9145691 is a deficient number, since it is larger than the sum of its proper divisors (47581).

9145691 is a wasteful number, since it uses less digits than its factorization.

9145691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47580.

The product of its digits is 9720, while the sum is 35.

The square root of 9145691 is about 3024.1843528462. The cubic root of 9145691 is about 209.1247852599.

The spelling of 9145691 in words is "nine million, one hundred forty-five thousand, six hundred ninety-one".