687501461 has 6 divisors (see below), whose sum is σ = 689286486. Its totient is φ = 685721000.

The previous prime is 687501457. The next prime is 687501497. The reversal of 687501461 is 164105786.

687501461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 561927025 + 125574436 = 23705^2 + 11206^2 .

It is not a de Polignac number, because 687501461 - 2² = 687501457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687501421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183911 + ... + 187611.

It is an arithmetic number, because the mean of its divisors is an integer number (114881081).

Almost surely, 2^687501461 is an apocalyptic number.

It is an amenable number.

687501461 is a deficient number, since it is larger than the sum of its proper divisors (1785025).

687501461 is an frugal number, since it uses more digits than its factorization.

687501461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563 (or 4132 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 687501461 is about 26220.2490644158. The cubic root of 687501461 is about 882.5877090237.

The spelling of 687501461 in words is "six hundred eighty-seven million, five hundred one thousand, four hundred sixty-one".