1990808967 has 8 divisors (see below), whose sum is σ = 3033613696. Its totient is φ = 1137605112.

The previous prime is 1990808959. The next prime is 1990808971. The reversal of 1990808967 is 7698080991.

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

It is not a de Polignac number, because 1990808967 - 2³ = 1990808959 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 (1990808917) 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, 47400193 + ... + 47400234.

It is an arithmetic number, because the mean of its divisors is an integer number (379201712).

Almost surely, 2^1990808967 is an apocalyptic number.

1990808967 is a deficient number, since it is larger than the sum of its proper divisors (1042804729).

1990808967 is an equidigital number, since it uses as much as digits as its factorization.

1990808967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94800437.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 1990808967 is about 44618.4823475653. The cubic root of 1990808967 is about 1257.9880898897.

The spelling of 1990808967 in words is "one billion, nine hundred ninety million, eight hundred eight thousand, nine hundred sixty-seven".