1691712742 has 8 divisors (see below), whose sum is σ = 2606152176. Its totient is φ = 822995352.

The previous prime is 1691712739. The next prime is 1691712761. The reversal of 1691712742 is 2472171961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1691712695 and 1691712704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11430418 + ... + 11430565.

It is an arithmetic number, because the mean of its divisors is an integer number (325769022).

Almost surely, 2^1691712742 is an apocalyptic number.

1691712742 is a deficient number, since it is larger than the sum of its proper divisors (914439434).

1691712742 is a wasteful number, since it uses less digits than its factorization.

1691712742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22861022.

The product of its digits is 42336, while the sum is 40.

The square root of 1691712742 is about 41130.4357137145. The cubic root of 1691712742 is about 1191.5406784524.

The spelling of 1691712742 in words is "one billion, six hundred ninety-one million, seven hundred twelve thousand, seven hundred forty-two".