9977955 has 16 divisors (see below), whose sum is σ = 17193120. Its totient is φ = 4912128.

The previous prime is 9977951. The next prime is 9977971. The reversal of 9977955 is 5597799.

It is a happy number.

It is not a de Polignac number, because 9977955 - 2² = 9977951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9977898 and 9977907.

It is not an unprimeable number, because it can be changed into a prime (9977951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25390 + ... + 25779.

It is an arithmetic number, because the mean of its divisors is an integer number (1074570).

Almost surely, 2^9977955 is an apocalyptic number.

9977955 is a deficient number, since it is larger than the sum of its proper divisors (7215165).

9977955 is a wasteful number, since it uses less digits than its factorization.

9977955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51190.

The product of its digits is 893025, while the sum is 51.

The square root of 9977955 is about 3158.7901164845. The cubic root of 9977955 is about 215.2850374829.

It can be divided in two parts, 99779 and 55, that multiplied together give a palindrome (5487845).

The spelling of 9977955 in words is "nine million, nine hundred seventy-seven thousand, nine hundred fifty-five".