900640687 has 8 divisors (see below), whose sum is σ = 907013520. Its totient is φ = 894290880.

The previous prime is 900640673. The next prime is 900640747. The reversal of 900640687 is 786046009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 900640687 - 2¹¹ = 900638639 is a prime.

It is a super-2 number, since 2×900640687² = 1622307294159663938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900640087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76864 + ... + 87802.

It is an arithmetic number, because the mean of its divisors is an integer number (113376690).

Almost surely, 2^900640687 is an apocalyptic number.

900640687 is a deficient number, since it is larger than the sum of its proper divisors (6372833).

900640687 is a wasteful number, since it uses less digits than its factorization.

900640687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11513.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 900640687 is about 30010.6762169732. The cubic root of 900640687 is about 965.7184326695.

The spelling of 900640687 in words is "nine hundred million, six hundred forty thousand, six hundred eighty-seven".