9870091 has 24 divisors (see below), whose sum is σ = 12733952. Its totient is φ = 7484400.

The previous prime is 9870071. The next prime is 9870143. The reversal of 9870091 is 1900789.

9870091 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9870091 - 2⁷ = 9869963 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9870061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36286 + ... + 36556.

Almost surely, 2^9870091 is an apocalyptic number.

9870091 is a deficient number, since it is larger than the sum of its proper divisors (2863861).

9870091 is a wasteful number, since it uses less digits than its factorization.

9870091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 9870091 is about 3141.6700972572. The cubic root of 9870091 is about 214.5064648501.

The spelling of 9870091 in words is "nine million, eight hundred seventy thousand, ninety-one".