9977969 has 4 divisors (see below), whose sum is σ = 10069620. Its totient is φ = 9886320.

The previous prime is 9977951. The next prime is 9977971. The reversal of 9977969 is 9697799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4892944 + 5085025 = 2212^2 + 2255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9977969 is a prime.

It is a super-2 number, since 2×9977969² = 199119730729922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9977909) 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, 45662 + ... + 45879.

It is an arithmetic number, because the mean of its divisors is an integer number (2517405).

Almost surely, 2^9977969 is an apocalyptic number.

It is an amenable number.

9977969 is a deficient number, since it is larger than the sum of its proper divisors (91651).

9977969 is a wasteful number, since it uses less digits than its factorization.

9977969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91650.

The product of its digits is 1928934, while the sum is 56.

The square root of 9977969 is about 3158.7923325220. The cubic root of 9977969 is about 215.2851381711.

The spelling of 9977969 in words is "nine million, nine hundred seventy-seven thousand, nine hundred sixty-nine".