9897977 has 8 divisors (see below), whose sum is σ = 10155936. Its totient is φ = 9643392.

The previous prime is 9897973. The next prime is 9897983. The reversal of 9897977 is 7797989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9897977 - 2² = 9897973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5738 + ... + 7260.

It is an arithmetic number, because the mean of its divisors is an integer number (1269492).

Almost surely, 2^9897977 is an apocalyptic number.

9897977 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

9897977 is a deficient number, since it is larger than the sum of its proper divisors (257959).

9897977 is a wasteful number, since it uses less digits than its factorization.

9897977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687.

The product of its digits is 2000376, while the sum is 56.

The square root of 9897977 is about 3146.1050522829. The cubic root of 9897977 is about 214.7082901661.

The spelling of 9897977 in words is "nine million, eight hundred ninety-seven thousand, nine hundred seventy-seven".