9877945 has 16 divisors (see below), whose sum is σ = 14779008. Its totient is φ = 6157440.

The previous prime is 9877937. The next prime is 9877961. The reversal of 9877945 is 5497789.

It is a happy number.

It is not a de Polignac number, because 9877945 - 2³ = 9877937 is a prime.

It is a Duffinian number.

9877945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12444 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (923688).

Almost surely, 2^9877945 is an apocalyptic number.

It is an amenable number.

9877945 is a deficient number, since it is larger than the sum of its proper divisors (4901063).

9877945 is a wasteful number, since it uses less digits than its factorization.

9877945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25680.

The product of its digits is 635040, while the sum is 49.

The square root of 9877945 is about 3142.9198208036. The cubic root of 9877945 is about 214.5633467000.

The spelling of 9877945 in words is "nine million, eight hundred seventy-seven thousand, nine hundred forty-five".