1971633338 has 16 divisors (see below), whose sum is σ = 3079256040. Its totient is φ = 946003200.

The previous prime is 1971633317. The next prime is 1971633341. The reversal of 1971633338 is 8333361791.

It can be written as a sum of positive squares in 4 ways, for example, as 179211769 + 1792421569 = 13387^2 + 42337^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192083 + ... + 202086.

Almost surely, 2^1971633338 is an apocalyptic number.

1971633338 is a deficient number, since it is larger than the sum of its proper divisors (1107622702).

1971633338 is a wasteful number, since it uses less digits than its factorization.

1971633338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394273.

The product of its digits is 244944, while the sum is 44.

The square root of 1971633338 is about 44403.0780239388. The cubic root of 1971633338 is about 1253.9360385119.

The spelling of 1971633338 in words is "one billion, nine hundred seventy-one million, six hundred thirty-three thousand, three hundred thirty-eight".