9977857 has 4 divisors (see below), whose sum is σ = 10071216. Its totient is φ = 9884500.

The previous prime is 9977839. The next prime is 9977867. The reversal of 9977857 is 7587799.

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 9977857 - 2¹⁹ = 9453569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9977867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46519 + ... + 46732.

It is an arithmetic number, because the mean of its divisors is an integer number (2517804).

It is a Proth number, since it is equal to 609 ⋅ 2¹⁴ + 1 and 609 < 2¹⁴.

Almost surely, 2^9977857 is an apocalyptic number.

It is an amenable number.

9977857 is a deficient number, since it is larger than the sum of its proper divisors (93359).

9977857 is a wasteful number, since it uses less digits than its factorization.

9977857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93358.

The product of its digits is 1111320, while the sum is 52.

The square root of 9977857 is about 3158.7746041780. The cubic root of 9977857 is about 215.2843326623.

The spelling of 9977857 in words is "nine million, nine hundred seventy-seven thousand, eight hundred fifty-seven".