1696139121 has 4 divisors (see below), whose sum is σ = 2261518832. Its totient is φ = 1130759412.

The previous prime is 1696139119. The next prime is 1696139141. The reversal of 1696139121 is 1219316961.

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.

It is not a de Polignac number, because 1696139121 - 2¹ = 1696139119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1696139121.

It is not an unprimeable number, because it can be changed into a prime (1696139141) 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, 282689851 + ... + 282689856.

It is an arithmetic number, because the mean of its divisors is an integer number (565379708).

Almost surely, 2^1696139121 is an apocalyptic number.

It is an amenable number.

1696139121 is a deficient number, since it is larger than the sum of its proper divisors (565379711).

1696139121 is an equidigital number, since it uses as much as digits as its factorization.

1696139121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565379710.

The product of its digits is 17496, while the sum is 39.

The square root of 1696139121 is about 41184.2096075668. The cubic root of 1696139121 is about 1192.5789984100.

The spelling of 1696139121 in words is "one billion, six hundred ninety-six million, one hundred thirty-nine thousand, one hundred twenty-one".