9977121 has 32 divisors (see below), whose sum is σ = 18432000. Its totient is φ = 5181840.

The previous prime is 9977069. The next prime is 9977137. The reversal of 9977121 is 1217799.

It is not a de Polignac number, because 9977121 - 2⁶ = 9977057 is a prime.

It is an Ulam number.

9977121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9977141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (576000).

Almost surely, 2^9977121 is an apocalyptic number.

It is an amenable number.

9977121 is a deficient number, since it is larger than the sum of its proper divisors (8454879).

9977121 is a wasteful number, since it uses less digits than its factorization.

9977121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4820 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 9977121 is about 3158.6581011562. The cubic root of 9977121 is about 215.2790391688.

It can be divided in two parts, 997 and 7121, that added together give a palindrome (8118).

The spelling of 9977121 in words is "nine million, nine hundred seventy-seven thousand, one hundred twenty-one".