687273501 has 12 divisors (see below), whose sum is σ = 973440512. Its totient is φ = 431229888.

The previous prime is 687273497. The next prime is 687273533. The reversal of 687273501 is 105372786.

It is not a de Polignac number, because 687273501 - 2² = 687273497 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 687273501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687273551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395485 + ... + 397218.

Almost surely, 2^687273501 is an apocalyptic number.

It is an amenable number.

687273501 is a deficient number, since it is larger than the sum of its proper divisors (286167011).

687273501 is a wasteful number, since it uses less digits than its factorization.

687273501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792740 (or 792723 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 687273501 is about 26215.9016819945. The cubic root of 687273501 is about 882.4901495047.

The spelling of 687273501 in words is "six hundred eighty-seven million, two hundred seventy-three thousand, five hundred one".