1971401368 has 8 divisors (see below), whose sum is σ = 3696377580. Its totient is φ = 985700680.

The previous prime is 1971401351. The next prime is 1971401371. The reversal of 1971401368 is 8631041791.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1971401368.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123212578 + ... + 123212593.

Almost surely, 2^1971401368 is an apocalyptic number.

It is an amenable number.

1971401368 is a deficient number, since it is larger than the sum of its proper divisors (1724976212).

1971401368 is a wasteful number, since it uses less digits than its factorization.

1971401368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246425177 (or 246425173 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1971401368 is about 44400.4658534119. The cubic root of 1971401368 is about 1253.8868598359.

The spelling of 1971401368 in words is "one billion, nine hundred seventy-one million, four hundred one thousand, three hundred sixty-eight".