1687271401 has 8 divisors (see below), whose sum is σ = 1731993984. Its totient is φ = 1642718880.

The previous prime is 1687271389. The next prime is 1687271413. The reversal of 1687271401 is 1041727861.

It is an interprime number because it is at equal distance from previous prime (1687271389) and next prime (1687271413).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1687271401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1687271431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22285 + ... + 62218.

It is an arithmetic number, because the mean of its divisors is an integer number (216499248).

Almost surely, 2^1687271401 is an apocalyptic number.

It is an amenable number.

1687271401 is a deficient number, since it is larger than the sum of its proper divisors (44722583).

1687271401 is an equidigital number, since it uses as much as digits as its factorization.

1687271401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85031.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1687271401 is about 41076.4093002297. The cubic root of 1687271401 is about 1190.4970268013.

The spelling of 1687271401 in words is "one billion, six hundred eighty-seven million, two hundred seventy-one thousand, four hundred one".