1680291127 has 4 divisors (see below), whose sum is σ = 1685764696. Its totient is φ = 1674817560.

The previous prime is 1680291121. The next prime is 1680291139. The reversal of 1680291127 is 7211920861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7211920861 = 131 ⋅55052831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680291127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680291121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2736324 + ... + 2736937.

It is an arithmetic number, because the mean of its divisors is an integer number (421441174).

Almost surely, 2^1680291127 is an apocalyptic number.

1680291127 is a deficient number, since it is larger than the sum of its proper divisors (5473569).

1680291127 is an equidigital number, since it uses as much as digits as its factorization.

1680291127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473568.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1680291127 is about 40991.3542957536. The cubic root of 1680291127 is about 1188.8530546884.

The spelling of 1680291127 in words is "one billion, six hundred eighty million, two hundred ninety-one thousand, one hundred twenty-seven".