1999738970 has 8 divisors (see below), whose sum is σ = 3599530164. Its totient is φ = 799895584.

The previous prime is 1999738921. The next prime is 1999738981. The reversal of 1999738970 is 798379991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1999610089 + 128881 = 44717^2 + 359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99986939 + ... + 99986958.

Almost surely, 2^1999738970 is an apocalyptic number.

1999738970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999738970 is a deficient number, since it is larger than the sum of its proper divisors (1599791194).

1999738970 is a wasteful number, since it uses less digits than its factorization.

1999738970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199973904.

The product of its (nonzero) digits is 7715736, while the sum is 62.

The square root of 1999738970 is about 44718.4410506449. The cubic root of 1999738970 is about 1259.8662346448.

The spelling of 1999738970 in words is "one billion, nine hundred ninety-nine million, seven hundred thirty-eight thousand, nine hundred seventy".