1974427487999 has 4 divisors (see below), whose sum is σ = 1974512276136. Its totient is φ = 1974342699864.

The previous prime is 1974427487951. The next prime is 1974427488031. The reversal of 1974427487999 is 9997847244791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1974427487999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974427487099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42359129 + ... + 42405714.

It is an arithmetic number, because the mean of its divisors is an integer number (493628069034).

Almost surely, 2^{1974427487999} is an apocalyptic number.

1974427487999 is a deficient number, since it is larger than the sum of its proper divisors (84788137).

1974427487999 is an equidigital number, since it uses as much as digits as its factorization.

1974427487999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84788136.

The product of its digits is 2304433152, while the sum is 80.

The spelling of 1974427487999 in words is "one trillion, nine hundred seventy-four billion, four hundred twenty-seven million, four hundred eighty-seven thousand, nine hundred ninety-nine".