687250801 has 4 divisors (see below), whose sum is σ = 689989104. Its totient is φ = 684512500.

The previous prime is 687250793. The next prime is 687250807. The reversal of 687250801 is 108052786.

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, and also an emirpimes, since its reverse is a distinct semiprime: 108052786 = 2 ⋅54026393.

It is a cyclic number.

It is not a de Polignac number, because 687250801 - 2³ = 687250793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687250807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368775 + ... + 1369276.

It is an arithmetic number, because the mean of its divisors is an integer number (172497276).

Almost surely, 2^687250801 is an apocalyptic number.

It is an amenable number.

687250801 is a deficient number, since it is larger than the sum of its proper divisors (2738303).

687250801 is a wasteful number, since it uses less digits than its factorization.

687250801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738302.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 687250801 is about 26215.4687350808. The cubic root of 687250801 is about 882.4804334567.

The spelling of 687250801 in words is "six hundred eighty-seven million, two hundred fifty thousand, eight hundred one".