688073587 has 4 divisors (see below), whose sum is σ = 690056856. Its totient is φ = 686090320.

The previous prime is 688073563. The next prime is 688073593. The reversal of 688073587 is 785370886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785370886 = 2 ⋅392685443.

It is a cyclic number.

It is not a de Polignac number, because 688073587 - 2¹⁹ = 687549299 is a prime.

It is a super-2 number, since 2×688073587² = 946890522254093138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688073527) 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, 991114 + ... + 991807.

It is an arithmetic number, because the mean of its divisors is an integer number (172514214).

Almost surely, 2^688073587 is an apocalyptic number.

688073587 is a deficient number, since it is larger than the sum of its proper divisors (1983269).

688073587 is a wasteful number, since it uses less digits than its factorization.

688073587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983268.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 688073587 is about 26231.1567987384. The cubic root of 688073587 is about 882.8324655314.

The spelling of 688073587 in words is "six hundred eighty-eight million, seventy-three thousand, five hundred eighty-seven".