688629419 has 2 divisors, whose sum is σ = 688629420. Its totient is φ = 688629418.

The previous prime is 688629379. The next prime is 688629437. The reversal of 688629419 is 914926886.

It is a happy number.

688629419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688629419 - 2¹² = 688625323 is a prime.

It is a super-2 number, since 2×688629419² = 948420953424555122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688629919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344314709 + 344314710.

It is an arithmetic number, because the mean of its divisors is an integer number (344314710).

Almost surely, 2^688629419 is an apocalyptic number.

688629419 is a deficient number, since it is larger than the sum of its proper divisors (1).

688629419 is an equidigital number, since it uses as much as digits as its factorization.

688629419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 53.

The square root of 688629419 is about 26241.7495415226. The cubic root of 688629419 is about 883.0701215375.

The spelling of 688629419 in words is "six hundred eighty-eight million, six hundred twenty-nine thousand, four hundred nineteen".