1606984687 has 32 divisors (see below), whose sum is σ = 2126767104. Its totient is φ = 1175539200.

The previous prime is 1606984681. The next prime is 1606984747. The reversal of 1606984687 is 7864896061.

It is a happy number.

It is not a de Polignac number, because 1606984687 - 2⁷ = 1606984559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606984681) 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, 602118 + ... + 604780.

It is an arithmetic number, because the mean of its divisors is an integer number (66461472).

Almost surely, 2^1606984687 is an apocalyptic number.

1606984687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1606984687 is a deficient number, since it is larger than the sum of its proper divisors (519782417).

1606984687 is a wasteful number, since it uses less digits than its factorization.

1606984687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 1606984687 is about 40087.2135100458. The cubic root of 1606984687 is about 1171.3065704230.

The spelling of 1606984687 in words is "one billion, six hundred six million, nine hundred eighty-four thousand, six hundred eighty-seven".