688009967 has 2 divisors, whose sum is σ = 688009968. Its totient is φ = 688009966.

The previous prime is 688009957. The next prime is 688009979. The reversal of 688009967 is 769900886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688009967 - 2⁸ = 688009711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688009937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344004983 + 344004984.

It is an arithmetic number, because the mean of its divisors is an integer number (344004984).

Almost surely, 2^688009967 is an apocalyptic number.

688009967 is a deficient number, since it is larger than the sum of its proper divisors (1).

688009967 is an equidigital number, since it uses as much as digits as its factorization.

688009967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 688009967 is about 26229.9440906762. The cubic root of 688009967 is about 882.8052554899.

The spelling of 688009967 in words is "six hundred eighty-eight million, nine thousand, nine hundred sixty-seven".