689479653 has 4 divisors (see below), whose sum is σ = 919306208. Its totient is φ = 459653100.

The previous prime is 689479603. The next prime is 689479729. The reversal of 689479653 is 356974986.

It is a happy number.

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 not a de Polignac number, because 689479653 - 2²⁰ = 688431077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689479593 and 689479602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689479603) 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, 114913273 + ... + 114913278.

It is an arithmetic number, because the mean of its divisors is an integer number (229826552).

Almost surely, 2^689479653 is an apocalyptic number.

It is an amenable number.

689479653 is a deficient number, since it is larger than the sum of its proper divisors (229826555).

689479653 is a wasteful number, since it uses less digits than its factorization.

689479653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229826554.

The product of its digits is 9797760, while the sum is 57.

The square root of 689479653 is about 26257.9445692156. The cubic root of 689479653 is about 883.4334071345.

The spelling of 689479653 in words is "six hundred eighty-nine million, four hundred seventy-nine thousand, six hundred fifty-three".