1687562961 has 32 divisors (see below), whose sum is σ = 2611614720. Its totient is φ = 949402944.

The previous prime is 1687562959. The next prime is 1687563011. The reversal of 1687562961 is 1692657861.

It is not a de Polignac number, because 1687562961 - 2¹ = 1687562959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1687562941) 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, 370846 + ... + 375368.

It is an arithmetic number, because the mean of its divisors is an integer number (81612960).

Almost surely, 2^1687562961 is an apocalyptic number.

It is an amenable number.

1687562961 is a deficient number, since it is larger than the sum of its proper divisors (924051759).

1687562961 is a wasteful number, since it uses less digits than its factorization.

1687562961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805.

The product of its digits is 1088640, while the sum is 51.

The square root of 1687562961 is about 41079.9581426272. The cubic root of 1687562961 is about 1190.5655953635.

The spelling of 1687562961 in words is "one billion, six hundred eighty-seven million, five hundred sixty-two thousand, nine hundred sixty-one".