9943977 has 4 divisors (see below), whose sum is σ = 13258640. Its totient is φ = 6629316.

The previous prime is 9943957. The next prime is 9943993. The reversal of 9943977 is 7793499.

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 not a de Polignac number, because 9943977 - 2⁷ = 9943849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9943907) 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, 1657327 + ... + 1657332.

It is an arithmetic number, because the mean of its divisors is an integer number (3314660).

Almost surely, 2^9943977 is an apocalyptic number.

It is an amenable number.

9943977 is a deficient number, since it is larger than the sum of its proper divisors (3314663).

9943977 is a wasteful number, since it uses less digits than its factorization.

9943977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314662.

The product of its digits is 428652, while the sum is 48.

The square root of 9943977 is about 3153.4072049134. The cubic root of 9943977 is about 215.0403890230.

The spelling of 9943977 in words is "nine million, nine hundred forty-three thousand, nine hundred seventy-seven".