9121901 has 4 divisors (see below), whose sum is σ = 9316032. Its totient is φ = 8927772.

The previous prime is 9121897. The next prime is 9121909. The reversal of 9121901 is 1091219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9121901 - 2² = 9121897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96995 + ... + 97088.

It is an arithmetic number, because the mean of its divisors is an integer number (2329008).

Almost surely, 2^9121901 is an apocalyptic number.

It is an amenable number.

9121901 is a deficient number, since it is larger than the sum of its proper divisors (194131).

9121901 is a wasteful number, since it uses less digits than its factorization.

9121901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194130.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 9121901 is about 3020.2484997099. The cubic root of 9121901 is about 208.9433009357.

It can be divided in two parts, 91 and 21901, that multiplied together give a palindrome (1992991).

The spelling of 9121901 in words is "nine million, one hundred twenty-one thousand, nine hundred one".