1999476447 has 8 divisors (see below), whose sum is σ = 2669679360. Its totient is φ = 1331128920.

The previous prime is 1999476431. The next prime is 1999476461. The reversal of 1999476447 is 7446749991.

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

It is not a de Polignac number, because 1999476447 - 2⁴ = 1999476431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999476407) 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, 461329 + ... + 465642.

It is an arithmetic number, because the mean of its divisors is an integer number (333709920).

Almost surely, 2^1999476447 is an apocalyptic number.

1999476447 is a deficient number, since it is larger than the sum of its proper divisors (670202913).

1999476447 is an equidigital number, since it uses as much as digits as its factorization.

1999476447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927693.

The product of its digits is 13716864, while the sum is 60.

The square root of 1999476447 is about 44715.5056663793. The cubic root of 1999476447 is about 1259.8111010594.

The spelling of 1999476447 in words is "one billion, nine hundred ninety-nine million, four hundred seventy-six thousand, four hundred forty-seven".