1999702397 has 24 divisors (see below), whose sum is σ = 2540321280. Its totient is φ = 1556573760.

The previous prime is 1999702387. The next prime is 1999702423. The reversal of 1999702397 is 7932079991.

It is not a de Polignac number, because 1999702397 - 2⁴ = 1999702381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999702387) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 892004 + ... + 894242.

It is an arithmetic number, because the mean of its divisors is an integer number (105846720).

Almost surely, 2^1999702397 is an apocalyptic number.

It is an amenable number.

1999702397 is a deficient number, since it is larger than the sum of its proper divisors (540618883).

1999702397 is a wasteful number, since it uses less digits than its factorization.

1999702397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 1928934, while the sum is 56.

The square root of 1999702397 is about 44718.0321235181. The cubic root of 1999702397 is about 1259.8585540809.

The spelling of 1999702397 in words is "one billion, nine hundred ninety-nine million, seven hundred two thousand, three hundred ninety-seven".