1699368609 has 4 divisors (see below), whose sum is σ = 2265824816. Its totient is φ = 1132912404.

The previous prime is 1699368527. The next prime is 1699368617. The reversal of 1699368609 is 9068639961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9068639961 = 3 ⋅3022879987.

It is not a de Polignac number, because 1699368609 - 2⁸ = 1699368353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1699360609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283228099 + ... + 283228104.

It is an arithmetic number, because the mean of its divisors is an integer number (566456204).

Almost surely, 2^1699368609 is an apocalyptic number.

It is an amenable number.

1699368609 is a deficient number, since it is larger than the sum of its proper divisors (566456207).

1699368609 is an equidigital number, since it uses as much as digits as its factorization.

1699368609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566456206.

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 1699368609 is about 41223.3988045624. The cubic root of 1699368609 is about 1193.3354178377.

The spelling of 1699368609 in words is "one billion, six hundred ninety-nine million, three hundred sixty-eight thousand, six hundred nine".