1689077471 has 4 divisors (see below), whose sum is σ = 1692165912. Its totient is φ = 1685989032.

The previous prime is 1689077461. The next prime is 1689077477. The reversal of 1689077471 is 1747709861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689077471 is a prime.

It is a super-3 number, since 3×1689077471³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689077477) 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, 1543400 + ... + 1544493.

It is an arithmetic number, because the mean of its divisors is an integer number (423041478).

Almost surely, 2^1689077471 is an apocalyptic number.

1689077471 is a deficient number, since it is larger than the sum of its proper divisors (3088441).

1689077471 is an equidigital number, since it uses as much as digits as its factorization.

1689077471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088440.

The product of its (nonzero) digits is 592704, while the sum is 50.

The square root of 1689077471 is about 41098.3876934363. The cubic root of 1689077471 is about 1190.9216481259.

The spelling of 1689077471 in words is "one billion, six hundred eighty-nine million, seventy-seven thousand, four hundred seventy-one".