687725039 has 2 divisors, whose sum is σ = 687725040. Its totient is φ = 687725038.

The previous prime is 687725033. The next prime is 687725057. The reversal of 687725039 is 930527786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687725039 - 2⁴ = 687725023 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 687724984 and 687725002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687725033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343862519 + 343862520.

It is an arithmetic number, because the mean of its divisors is an integer number (343862520).

Almost surely, 2^687725039 is an apocalyptic number.

687725039 is a deficient number, since it is larger than the sum of its proper divisors (1).

687725039 is an equidigital number, since it uses as much as digits as its factorization.

687725039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 687725039 is about 26224.5121784944. The cubic root of 687725039 is about 882.6833722425.

The spelling of 687725039 in words is "six hundred eighty-seven million, seven hundred twenty-five thousand, thirty-nine".