1688601401 has 4 divisors (see below), whose sum is σ = 1688880000. Its totient is φ = 1688322804.

The previous prime is 1688601389. The next prime is 1688601407. The reversal of 1688601401 is 1041068861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1688601401 - 2⁶ = 1688601337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688601407) 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 in 3 ways as a sum of consecutive naturals, for example, 130001 + ... + 142398.

It is an arithmetic number, because the mean of its divisors is an integer number (422220000).

Almost surely, 2^1688601401 is an apocalyptic number.

It is an amenable number.

1688601401 is a deficient number, since it is larger than the sum of its proper divisors (278599).

1688601401 is an equidigital number, since it uses as much as digits as its factorization.

1688601401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278598.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1688601401 is about 41092.5954522223. The cubic root of 1688601401 is about 1190.8097496974.

The spelling of 1688601401 in words is "one billion, six hundred eighty-eight million, six hundred one thousand, four hundred one".