1687892045 has 16 divisors (see below), whose sum is σ = 2318077440. Its totient is φ = 1155784704.

The previous prime is 1687892033. The next prime is 1687892047. The reversal of 1687892045 is 5402987861.

It is a cyclic number.

It is not a de Polignac number, because 1687892045 - 2²⁴ = 1671114829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1687891984 and 1687892002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687892047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8372 + ... + 58701.

It is an arithmetic number, because the mean of its divisors is an integer number (144879840).

Almost surely, 2^1687892045 is an apocalyptic number.

It is an amenable number.

1687892045 is a deficient number, since it is larger than the sum of its proper divisors (630185395).

1687892045 is an equidigital number, since it uses as much as digits as its factorization.

1687892045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67804.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 1687892045 is about 41083.9633555479. The cubic root of 1687892045 is about 1190.6429792662.

The spelling of 1687892045 in words is "one billion, six hundred eighty-seven million, eight hundred ninety-two thousand, forty-five".