1000199397 has 4 divisors (see below), whose sum is σ = 1333599200. Its totient is φ = 666799596.

The previous prime is 1000199341. The next prime is 1000199399. The reversal of 1000199397 is 7939910001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7939910001 = 3 ⋅2646636667.

It is not a de Polignac number, because 1000199397 - 2⁷ = 1000199269 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 (1000199399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166699897 + ... + 166699902.

It is an arithmetic number, because the mean of its divisors is an integer number (333399800).

Almost surely, 2^1000199397 is an apocalyptic number.

It is an amenable number.

1000199397 is a deficient number, since it is larger than the sum of its proper divisors (333399803).

1000199397 is an equidigital number, since it uses as much as digits as its factorization.

1000199397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333399802.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 1000199397 is about 31625.9291879306. The cubic root of 1000199397 is about 1000.0664612495.

The spelling of 1000199397 in words is "one billion, one hundred ninety-nine thousand, three hundred ninety-seven".