1097391999 has 8 divisors (see below), whose sum is σ = 1596206592. Its totient is φ = 665086040.

The previous prime is 1097391979. The next prime is 1097392001. The reversal of 1097391999 is 9991937901.

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

It is a cyclic number.

It is not a de Polignac number, because 1097391999 - 2⁹ = 1097391487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097391979) 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 7 ways as a sum of consecutive naturals, for example, 16627119 + ... + 16627184.

It is an arithmetic number, because the mean of its divisors is an integer number (199525824).

Almost surely, 2^1097391999 is an apocalyptic number.

1097391999 is a deficient number, since it is larger than the sum of its proper divisors (498814593).

1097391999 is a wasteful number, since it uses less digits than its factorization.

1097391999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33254317.

The product of its (nonzero) digits is 1240029, while the sum is 57.

The square root of 1097391999 is about 33126.9074771552. The cubic root of 1097391999 is about 1031.4636554488.

The spelling of 1097391999 in words is "one billion, ninety-seven million, three hundred ninety-one thousand, nine hundred ninety-nine".