1990097329 has 8 divisors (see below), whose sum is σ = 2175372000. Its totient is φ = 1805548800.

The previous prime is 1990097327. The next prime is 1990097339. The reversal of 1990097329 is 9237900991.

1990097329 is nontrivially palindromic in base 8.

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

It is not a de Polignac number, because 1990097329 - 2¹ = 1990097327 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990097327) 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, 175792 + ... + 186769.

It is an arithmetic number, because the mean of its divisors is an integer number (271921500).

Almost surely, 2^1990097329 is an apocalyptic number.

It is an amenable number.

1990097329 is a deficient number, since it is larger than the sum of its proper divisors (185274671).

1990097329 is a wasteful number, since it uses less digits than its factorization.

1990097329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363071.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 1990097329 is about 44610.5069350260. The cubic root of 1990097329 is about 1257.8381778297.

The spelling of 1990097329 in words is "one billion, nine hundred ninety million, ninety-seven thousand, three hundred twenty-nine".