1990929297 has 8 divisors (see below), whose sum is σ = 3033797056. Its totient is φ = 1137673872.

The previous prime is 1990929277. The next prime is 1990929299. The reversal of 1990929297 is 7929290991.

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

It is not a de Polignac number, because 1990929297 - 2¹⁸ = 1990667153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990929299) 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 7 ways as a sum of consecutive naturals, for example, 47403058 + ... + 47403099.

It is an arithmetic number, because the mean of its divisors is an integer number (379224632).

Almost surely, 2^1990929297 is an apocalyptic number.

It is an amenable number.

1990929297 is a deficient number, since it is larger than the sum of its proper divisors (1042867759).

1990929297 is an equidigital number, since it uses as much as digits as its factorization.

1990929297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94806167.

The product of its (nonzero) digits is 1653372, while the sum is 57.

The square root of 1990929297 is about 44619.8307594280. The cubic root of 1990929297 is about 1258.0134348055.

The spelling of 1990929297 in words is "one billion, nine hundred ninety million, nine hundred twenty-nine thousand, two hundred ninety-seven".