1690568674 has 4 divisors (see below), whose sum is σ = 2535853014. Its totient is φ = 845284336.

The previous prime is 1690568647. The next prime is 1690568741. The reversal of 1690568674 is 4768650961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4768650961 = 157 ⋅30373573.

It can be written as a sum of positive squares in only one way, i.e., 1689785449 + 783225 = 41107^2 + 885^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422642167 + ... + 422642170.

Almost surely, 2^1690568674 is an apocalyptic number.

1690568674 is a deficient number, since it is larger than the sum of its proper divisors (845284340).

1690568674 is an equidigital number, since it uses as much as digits as its factorization.

1690568674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845284339.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 1690568674 is about 41116.5255584661. The cubic root of 1690568674 is about 1191.2720136560.

The spelling of 1690568674 in words is "one billion, six hundred ninety million, five hundred sixty-eight thousand, six hundred seventy-four".