1986932140169 has 2 divisors, whose sum is σ = 1986932140170. Its totient is φ = 1986932140168.

The previous prime is 1986932140133. The next prime is 1986932140201. The reversal of 1986932140169 is 9610412396891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1689056331769 + 297875808400 = 1299637^2 + 545780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1986932140169 is a prime.

It is a super-2 number, since 2×1986932140169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1986932140129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993466070084 + 993466070085.

It is an arithmetic number, because the mean of its divisors is an integer number (993466070085).

Almost surely, 2^{1986932140169} is an apocalyptic number.

It is an amenable number.

1986932140169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986932140169 is an equidigital number, since it uses as much as digits as its factorization.

1986932140169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 1986932140169 in words is "one trillion, nine hundred eighty-six billion, nine hundred thirty-two million, one hundred forty thousand, one hundred sixty-nine".