1969993986 has 24 divisors (see below), whose sum is σ = 4148353680. Its totient is φ = 621953712.

The previous prime is 1969993979. The next prime is 1969994021. The reversal of 1969993986 is 6893999691.

It is a self number, because there is not a number n which added to its sum of digits gives 1969993986.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471820 + ... + 475976.

It is an arithmetic number, because the mean of its divisors is an integer number (172848070).

Almost surely, 2^1969993986 is an apocalyptic number.

1969993986 is an abundant number, since it is smaller than the sum of its proper divisors (2178359694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1969993986 is an frugal number, since it uses more digits than its factorization.

1969993986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338 (or 4181 counting only the distinct ones).

The product of its digits is 51018336, while the sum is 69.

The square root of 1969993986 is about 44384.6142936942. The cubic root of 1969993986 is about 1253.5884058308.

The spelling of 1969993986 in words is "one billion, nine hundred sixty-nine million, nine hundred ninety-three thousand, nine hundred eighty-six".