1689737423 has 16 divisors (see below), whose sum is σ = 2004541344. Its totient is φ = 1406684160.

The previous prime is 1689737419. The next prime is 1689737437. The reversal of 1689737423 is 3247379861.

It is a cyclic number.

It is not a de Polignac number, because 1689737423 - 2² = 1689737419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689737443) 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, 115190 + ... + 129027.

It is an arithmetic number, because the mean of its divisors is an integer number (125283834).

Almost surely, 2^1689737423 is an apocalyptic number.

1689737423 is a deficient number, since it is larger than the sum of its proper divisors (314803921).

1689737423 is a wasteful number, since it uses less digits than its factorization.

1689737423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244282.

The product of its digits is 1524096, while the sum is 50.

The square root of 1689737423 is about 41106.4158374335. The cubic root of 1689737423 is about 1191.0767325428.

The spelling of 1689737423 in words is "one billion, six hundred eighty-nine million, seven hundred thirty-seven thousand, four hundred twenty-three".