1699890639 has 16 divisors (see below), whose sum is σ = 2401324128. Its totient is φ = 1065940992.

The previous prime is 1699890623. The next prime is 1699890659. The reversal of 1699890639 is 9360989961.

It is not a de Polignac number, because 1699890639 - 2⁴ = 1699890623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1699890659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81249 + ... + 100005.

It is an arithmetic number, because the mean of its divisors is an integer number (150082758).

Almost surely, 2^1699890639 is an apocalyptic number.

1699890639 is a deficient number, since it is larger than the sum of its proper divisors (701433489).

1699890639 is a wasteful number, since it uses less digits than its factorization.

1699890639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20554.

The product of its (nonzero) digits is 5668704, while the sum is 60.

The square root of 1699890639 is about 41229.7300379229. The cubic root of 1699890639 is about 1193.4575991206.

The spelling of 1699890639 in words is "one billion, six hundred ninety-nine million, eight hundred ninety thousand, six hundred thirty-nine".