689312547 has 36 divisors (see below), whose sum is σ = 1263535416. Its totient is φ = 358081920.

The previous prime is 689312527. The next prime is 689312557. The reversal of 689312547 is 745213986.

689312547 is a `hidden beast` number, since 6 + 8 + 93 + 12 + 547 = 666.

It is not a de Polignac number, because 689312547 - 2¹⁴ = 689296163 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (689312527) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66198 + ... + 75899.

It is an arithmetic number, because the mean of its divisors is an integer number (35098206).

Almost surely, 2^689312547 is an apocalyptic number.

689312547 is a deficient number, since it is larger than the sum of its proper divisors (574222869).

689312547 is a wasteful number, since it uses less digits than its factorization.

689312547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142128 (or 142118 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 689312547 is about 26254.7623679972. The cubic root of 689312547 is about 883.3620301424.

It can be divided in two parts, 689 and 312547, that added together give a triangular number (313236 = T₇₉₁).

The spelling of 689312547 in words is "six hundred eighty-nine million, three hundred twelve thousand, five hundred forty-seven".