9919977 has 4 divisors (see below), whose sum is σ = 13226640. Its totient is φ = 6613316.

The previous prime is 9919963. The next prime is 9919979. The reversal of 9919977 is 7799199.

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 9919977 - 2⁷ = 9919849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9919979) 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, 1653327 + ... + 1653332.

It is an arithmetic number, because the mean of its divisors is an integer number (3306660).

Almost surely, 2^9919977 is an apocalyptic number.

It is an amenable number.

9919977 is a deficient number, since it is larger than the sum of its proper divisors (3306663).

9919977 is a wasteful number, since it uses less digits than its factorization.

9919977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306662.

The product of its digits is 321489, while the sum is 51.

The square root of 9919977 is about 3149.5994983490. The cubic root of 9919977 is about 214.8672481375.

The spelling of 9919977 in words is "nine million, nine hundred nineteen thousand, nine hundred seventy-seven".