2689978507 has 2 divisors, whose sum is σ = 2689978508. Its totient is φ = 2689978506.

The previous prime is 2689978463. The next prime is 2689978513. The reversal of 2689978507 is 7058799862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2689978507 - 2¹⁹ = 2689454219 is a prime.

It is not a weakly prime, because it can be changed into another prime (2689978537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344989253 + 1344989254.

It is an arithmetic number, because the mean of its divisors is an integer number (1344989254).

Almost surely, 2^2689978507 is an apocalyptic number.

2689978507 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689978507 is an equidigital number, since it uses as much as digits as its factorization.

2689978507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The square root of 2689978507 is about 51865.0027185963. The cubic root of 2689978507 is about 1390.7517123384.

The spelling of 2689978507 in words is "two billion, six hundred eighty-nine million, nine hundred seventy-eight thousand, five hundred seven".