6908627989 has 2 divisors, whose sum is σ = 6908627990. Its totient is φ = 6908627988.

The previous prime is 6908627983. The next prime is 6908628007. The reversal of 6908627989 is 9897268096.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6654480625 + 254147364 = 81575^2 + 15942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6908627989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6908627989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6908627983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454313994 + 3454313995.

It is an arithmetic number, because the mean of its divisors is an integer number (3454313995).

Almost surely, 2^6908627989 is an apocalyptic number.

It is an amenable number.

6908627989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6908627989 is an equidigital number, since it uses as much as digits as its factorization.

6908627989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 64.

The square root of 6908627989 is about 83118.1567950108. The cubic root of 6908627989 is about 1904.5714472874.

The spelling of 6908627989 in words is "six billion, nine hundred eight million, six hundred twenty-seven thousand, nine hundred eighty-nine".