1690496906 has 16 divisors (see below), whose sum is σ = 2905650240. Its totient is φ = 722584800.

The previous prime is 1690496897. The next prime is 1690496909. The reversal of 1690496906 is 6096940961.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1690496909) 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, 153995 + ... + 164606.

It is an arithmetic number, because the mean of its divisors is an integer number (181603140).

Almost surely, 2^1690496906 is an apocalyptic number.

1690496906 is a deficient number, since it is larger than the sum of its proper divisors (1215153334).

1690496906 is a wasteful number, since it uses less digits than its factorization.

1690496906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318989.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 1690496906 is about 41115.6528100917. The cubic root of 1690496906 is about 1191.2551561293.

The spelling of 1690496906 in words is "one billion, six hundred ninety million, four hundred ninety-six thousand, nine hundred six".