1999987413 has 8 divisors (see below), whose sum is σ = 2752670976. Its totient is φ = 1290314400.

The previous prime is 1999987403. The next prime is 1999987439. The reversal of 1999987413 is 3147899991.

It is a happy number.

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

It is not a de Polignac number, because 1999987413 - 2¹⁰ = 1999986389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999987403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10752528 + ... + 10752713.

It is an arithmetic number, because the mean of its divisors is an integer number (344083872).

Almost surely, 2^1999987413 is an apocalyptic number.

It is an amenable number.

1999987413 is a deficient number, since it is larger than the sum of its proper divisors (752683563).

1999987413 is a wasteful number, since it uses less digits than its factorization.

1999987413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21505275.

The product of its digits is 4408992, while the sum is 60.

The square root of 1999987413 is about 44721.2188228362. The cubic root of 1999987413 is about 1259.9184067850.

The spelling of 1999987413 in words is "one billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, four hundred thirteen".