906561687 has 32 divisors (see below), whose sum is σ = 1304043520. Its totient is φ = 558472320.

The previous prime is 906561637. The next prime is 906561697. The reversal of 906561687 is 786165609.

It is not a de Polignac number, because 906561687 - 2⁷ = 906561559 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 (906561637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 440553 + ... + 442605.

It is an arithmetic number, because the mean of its divisors is an integer number (40751360).

Almost surely, 2^906561687 is an apocalyptic number.

906561687 is a deficient number, since it is larger than the sum of its proper divisors (397481833).

906561687 is a wasteful number, since it uses less digits than its factorization.

906561687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 906561687 is about 30109.1628412349. The cubic root of 906561687 is about 967.8300901465.

The spelling of 906561687 in words is "nine hundred six million, five hundred sixty-one thousand, six hundred eighty-seven".