1990006693 has 8 divisors (see below), whose sum is σ = 2024445600. Its totient is φ = 1955591568.

The previous prime is 1990006691. The next prime is 1990006699. The reversal of 1990006693 is 3966000991.

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 1990006693 - 2¹ = 1990006691 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 (1990006691) 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, 279030 + ... + 286072.

It is an arithmetic number, because the mean of its divisors is an integer number (253055700).

Almost surely, 2^1990006693 is an apocalyptic number.

It is an amenable number.

1990006693 is a deficient number, since it is larger than the sum of its proper divisors (34438907).

1990006693 is an equidigital number, since it uses as much as digits as its factorization.

1990006693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 1990006693 is about 44609.4910641222. The cubic root of 1990006693 is about 1257.8190820883.

The spelling of 1990006693 in words is "one billion, nine hundred ninety million, six thousand, six hundred ninety-three".