1690990169 has 12 divisors (see below), whose sum is σ = 1895938128. Its totient is φ = 1495702800.

The previous prime is 1690990157. The next prime is 1690990207. The reversal of 1690990169 is 9610990961.

It is a de Polignac number, because none of the positive numbers 2^k-1690990169 is a prime.

It is a super-2 number, since 2×1690990169² = 5718895503309297122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690990109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41087 + ... + 71204.

It is an arithmetic number, because the mean of its divisors is an integer number (157994844).

Almost surely, 2^1690990169 is an apocalyptic number.

It is an amenable number.

1690990169 is a deficient number, since it is larger than the sum of its proper divisors (204947959).

1690990169 is a wasteful number, since it uses less digits than its factorization.

1690990169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112376 (or 112339 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 1690990169 is about 41121.6508545073. The cubic root of 1690990169 is about 1191.3710086435.

The spelling of 1690990169 in words is "one billion, six hundred ninety million, nine hundred ninety thousand, one hundred sixty-nine".