6969977789 has 2 divisors, whose sum is σ = 6969977790. Its totient is φ = 6969977788.

The previous prime is 6969977741. The next prime is 6969977809. The reversal of 6969977789 is 9877799696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5804916100 + 1165061689 = 76190^2 + 34133^2 .

It is a cyclic number.

It is not a de Polignac number, because 6969977789 - 2⁸ = 6969977533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6969970789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3484988894 + 3484988895.

It is an arithmetic number, because the mean of its divisors is an integer number (3484988895).

Almost surely, 2^6969977789 is an apocalyptic number.

It is an amenable number.

6969977789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6969977789 is an equidigital number, since it uses as much as digits as its factorization.

6969977789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648121824, while the sum is 77.

The square root of 6969977789 is about 83486.3928373960. The cubic root of 6969977789 is about 1910.1924816298.

The spelling of 6969977789 in words is "six billion, nine hundred sixty-nine million, nine hundred seventy-seven thousand, seven hundred eighty-nine".