9977949 has 12 divisors (see below), whose sum is σ = 14469312. Its totient is φ = 6625800.

The previous prime is 9977923. The next prime is 9977951. The reversal of 9977949 is 9497799.

It is not a de Polignac number, because 9977949 - 2⁵ = 9977917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9977895 and 9977904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394 + ... + 4484.

It is an arithmetic number, because the mean of its divisors is an integer number (1205776).

Almost surely, 2^9977949 is an apocalyptic number.

It is an amenable number.

9977949 is a deficient number, since it is larger than the sum of its proper divisors (4491363).

9977949 is a wasteful number, since it uses less digits than its factorization.

9977949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368 (or 4365 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 9977949 is about 3158.7891667536. The cubic root of 9977949 is about 215.2849943307.

The spelling of 9977949 in words is "nine million, nine hundred seventy-seven thousand, nine hundred forty-nine".