9977207 has 4 divisors (see below), whose sum is σ = 10189536. Its totient is φ = 9764880.

The previous prime is 9977203. The next prime is 9977213. The reversal of 9977207 is 7027799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7027799 = 127 ⋅55337.

It is a cyclic number.

It is not a de Polignac number, because 9977207 - 2² = 9977203 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977203) 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, 106094 + ... + 106187.

It is an arithmetic number, because the mean of its divisors is an integer number (2547384).

Almost surely, 2^9977207 is an apocalyptic number.

9977207 is a deficient number, since it is larger than the sum of its proper divisors (212329).

9977207 is a wasteful number, since it uses less digits than its factorization.

9977207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212328.

The product of its (nonzero) digits is 55566, while the sum is 41.

The square root of 9977207 is about 3158.6717145028. The cubic root of 9977207 is about 215.2796577154.

The spelling of 9977207 in words is "nine million, nine hundred seventy-seven thousand, two hundred seven".