1699138641 has 16 divisors (see below), whose sum is σ = 2285050880. Its totient is φ = 1123016400.

The previous prime is 1699138633. The next prime is 1699138657. The reversal of 1699138641 is 1468319961.

It is a happy number.

It is not a de Polignac number, because 1699138641 - 2³ = 1699138633 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1699138541) 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, 340716 + ... + 345666.

It is an arithmetic number, because the mean of its divisors is an integer number (142815680).

Almost surely, 2^1699138641 is an apocalyptic number.

It is an amenable number.

1699138641 is a deficient number, since it is larger than the sum of its proper divisors (585912239).

1699138641 is a wasteful number, since it uses less digits than its factorization.

1699138641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5916.

The product of its digits is 279936, while the sum is 48.

The square root of 1699138641 is about 41220.6094205314. The cubic root of 1699138641 is about 1193.2815858168.

The spelling of 1699138641 in words is "one billion, six hundred ninety-nine million, one hundred thirty-eight thousand, six hundred forty-one".