6912877949 has 4 divisors (see below), whose sum is σ = 6913048380. Its totient is φ = 6912707520.

The previous prime is 6912877921. The next prime is 6912877969. The reversal of 6912877949 is 9497782196.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5469637849 + 1443240100 = 73957^2 + 37990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6912877949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6912877891 and 6912877900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6912877969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14597 + ... + 118485.

It is an arithmetic number, because the mean of its divisors is an integer number (1728262095).

Almost surely, 2^6912877949 is an apocalyptic number.

It is an amenable number.

6912877949 is a deficient number, since it is larger than the sum of its proper divisors (170431).

6912877949 is a wasteful number, since it uses less digits than its factorization.

6912877949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170430.

The product of its digits is 13716864, while the sum is 62.

The square root of 6912877949 is about 83143.7186382712. The cubic root of 6912877949 is about 1904.9619104037.

The spelling of 6912877949 in words is "six billion, nine hundred twelve million, eight hundred seventy-seven thousand, nine hundred forty-nine".