1986627028697 has 4 divisors (see below), whose sum is σ = 1986652909056. Its totient is φ = 1986601148340.

The previous prime is 1986627028619. The next prime is 1986627028733. The reversal of 1986627028697 is 7968207266891.

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 1986627028697 - 2²⁶ = 1986559919833 is a prime.

It is a super-2 number, since 2×1986627028697² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1986627028697.

It is not an unprimeable number, because it can be changed into a prime (1986627028297) 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, 12824693 + ... + 12978674.

It is an arithmetic number, because the mean of its divisors is an integer number (496663227264).

Almost surely, 2^{1986627028697} is an apocalyptic number.

It is an amenable number.

1986627028697 is a deficient number, since it is larger than the sum of its proper divisors (25880359).

1986627028697 is an equidigital number, since it uses as much as digits as its factorization.

1986627028697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25880358.

The product of its (nonzero) digits is 219469824, while the sum is 71.

The spelling of 1986627028697 in words is "one trillion, nine hundred eighty-six billion, six hundred twenty-seven million, twenty-eight thousand, six hundred ninety-seven".