689483749 has 4 divisors (see below), whose sum is σ = 704153664. Its totient is φ = 674813836.

The previous prime is 689483737. The next prime is 689483779. The reversal of 689483749 is 947384986.

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 a cyclic number.

It is not a de Polignac number, because 689483749 - 2²¹ = 687386597 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689483693 and 689483702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689483779) 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, 7334887 + ... + 7334980.

It is an arithmetic number, because the mean of its divisors is an integer number (176038416).

Almost surely, 2^689483749 is an apocalyptic number.

It is an amenable number.

689483749 is a deficient number, since it is larger than the sum of its proper divisors (14669915).

689483749 is a wasteful number, since it uses less digits than its factorization.

689483749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14669914.

The product of its digits is 10450944, while the sum is 58.

The square root of 689483749 is about 26258.0225645421. The cubic root of 689483749 is about 883.4351565388.

The spelling of 689483749 in words is "six hundred eighty-nine million, four hundred eighty-three thousand, seven hundred forty-nine".