9070921 has 4 divisors (see below), whose sum is σ = 9079492. Its totient is φ = 9062352.

The previous prime is 9070913. The next prime is 9070933. The reversal of 9070921 is 1290709.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 6446521 = 1620^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 9070921 - 2³ = 9070913 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9070921.

It is not an unprimeable number, because it can be changed into a prime (9070951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430 + ... + 4903.

It is an arithmetic number, because the mean of its divisors is an integer number (2269873).

Almost surely, 2^9070921 is an apocalyptic number.

It is an amenable number.

9070921 is a deficient number, since it is larger than the sum of its proper divisors (8571).

9070921 is a wasteful number, since it uses less digits than its factorization.

9070921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8570.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 9070921 is about 3011.7969719090. The cubic root of 9070921 is about 208.5533297746.

The spelling of 9070921 in words is "nine million, seventy thousand, nine hundred twenty-one".