1999223097 has 8 divisors (see below), whose sum is σ = 2675468160. Its totient is φ = 1327896720.

The previous prime is 1999223081. The next prime is 1999223131. The reversal of 1999223097 is 7903229991.

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 1999223097 - 2⁴ = 1999223081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1999223027) 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, 1228722 + ... + 1230347.

It is an arithmetic number, because the mean of its divisors is an integer number (334433520).

Almost surely, 2^1999223097 is an apocalyptic number.

It is an amenable number.

1999223097 is a deficient number, since it is larger than the sum of its proper divisors (676245063).

1999223097 is a wasteful number, since it uses less digits than its factorization.

1999223097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459343.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 1999223097 is about 44712.6726667060. The cubic root of 1999223097 is about 1259.7578893592.

The spelling of 1999223097 in words is "one billion, nine hundred ninety-nine million, two hundred twenty-three thousand, ninety-seven".