689519377 has 4 divisors (see below), whose sum is σ = 689572836. Its totient is φ = 689465920.

The previous prime is 689519357. The next prime is 689519393. The reversal of 689519377 is 773915986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28206721 + 661312656 = 5311^2 + 25716^2 .

It is a cyclic number.

It is not a de Polignac number, because 689519377 - 2⁷ = 689519249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689519357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5877 + ... + 37597.

It is an arithmetic number, because the mean of its divisors is an integer number (172393209).

Almost surely, 2^689519377 is an apocalyptic number.

It is an amenable number.

689519377 is a deficient number, since it is larger than the sum of its proper divisors (53459).

689519377 is a wasteful number, since it uses less digits than its factorization.

689519377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53458.

The product of its digits is 2857680, while the sum is 55.

The square root of 689519377 is about 26258.7009770095. The cubic root of 689519377 is about 883.4503729891.

The spelling of 689519377 in words is "six hundred eighty-nine million, five hundred nineteen thousand, three hundred seventy-seven".