1986797126 has 4 divisors (see below), whose sum is σ = 2980195692. Its totient is φ = 993398562.

The previous prime is 1986797119. The next prime is 1986797171. The reversal of 1986797126 is 6217976891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6217976891 = 7 ⋅888282413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496699280 + ... + 496699283.

It is an arithmetic number, because the mean of its divisors is an integer number (745048923).

Almost surely, 2^1986797126 is an apocalyptic number.

1986797126 is a deficient number, since it is larger than the sum of its proper divisors (993398566).

1986797126 is an equidigital number, since it uses as much as digits as its factorization.

1986797126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993398565.

The product of its digits is 2286144, while the sum is 56.

The square root of 1986797126 is about 44573.5025098993. The cubic root of 1986797126 is about 1257.1424969364.

The spelling of 1986797126 in words is "one billion, nine hundred eighty-six million, seven hundred ninety-seven thousand, one hundred twenty-six".