9891954 has 12 divisors (see below), whose sum is σ = 21432606. Its totient is φ = 3297312.

The previous prime is 9891953. The next prime is 9891991. The reversal of 9891954 is 4591989.

9891954 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 1159929 = 2955^2 + 1077^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9891953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274759 + ... + 274794.

Almost surely, 2^9891954 is an apocalyptic number.

9891954 is an abundant number, since it is smaller than the sum of its proper divisors (11540652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9891954 is a wasteful number, since it uses less digits than its factorization.

9891954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549561 (or 549558 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 9891954 is about 3145.1476912857. The cubic root of 9891954 is about 214.6647307457.

The spelling of 9891954 in words is "nine million, eight hundred ninety-one thousand, nine hundred fifty-four".