1690568002 has 4 divisors (see below), whose sum is σ = 2535852006. Its totient is φ = 845284000.

The previous prime is 1690567973. The next prime is 1690568003. The reversal of 1690568002 is 2008650961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1421968681 + 268599321 = 37709^2 + 16389^2 .

It is not an unprimeable number, because it can be changed into a prime (1690568003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422641999 + ... + 422642002.

Almost surely, 2^1690568002 is an apocalyptic number.

1690568002 is a deficient number, since it is larger than the sum of its proper divisors (845284004).

1690568002 is an equidigital number, since it uses as much as digits as its factorization.

1690568002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845284003.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1690568002 is about 41116.5173865686. The cubic root of 1690568002 is about 1191.2718558127.

The spelling of 1690568002 in words is "one billion, six hundred ninety million, five hundred sixty-eight thousand, two".