688248767 has 2 divisors, whose sum is σ = 688248768. Its totient is φ = 688248766.

The previous prime is 688248739. The next prime is 688248779. The reversal of 688248767 is 767842886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688248767 - 2¹⁶ = 688183231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688248707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344124383 + 344124384.

It is an arithmetic number, because the mean of its divisors is an integer number (344124384).

Almost surely, 2^688248767 is an apocalyptic number.

688248767 is a deficient number, since it is larger than the sum of its proper divisors (1).

688248767 is an equidigital number, since it uses as much as digits as its factorization.

688248767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 56.

The square root of 688248767 is about 26234.4957451063. The cubic root of 688248767 is about 882.9073807107.

The spelling of 688248767 in words is "six hundred eighty-eight million, two hundred forty-eight thousand, seven hundred sixty-seven".