6989184977 has 2 divisors, whose sum is σ = 6989184978. Its totient is φ = 6989184976.

The previous prime is 6989184973. The next prime is 6989185003. The reversal of 6989184977 is 7794819896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5368639441 + 1620545536 = 73271^2 + 40256^2 .

It is a cyclic number.

It is not a de Polignac number, because 6989184977 - 2² = 6989184973 is a prime.

It is not a weakly prime, because it can be changed into another prime (6989184973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494592488 + 3494592489.

It is an arithmetic number, because the mean of its divisors is an integer number (3494592489).

Almost surely, 2^6989184977 is an apocalyptic number.

It is an amenable number.

6989184977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989184977 is an equidigital number, since it uses as much as digits as its factorization.

6989184977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 68.

The square root of 6989184977 is about 83601.3455453918. The cubic root of 6989184977 is about 1911.9455133229.

The spelling of 6989184977 in words is "six billion, nine hundred eighty-nine million, one hundred eighty-four thousand, nine hundred seventy-seven".