1681792087 has 8 divisors (see below), whose sum is σ = 1770975360. Its totient is φ = 1592675640.

The previous prime is 1681792033. The next prime is 1681792127. The reversal of 1681792087 is 7802971861.

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 1681792087 - 2⁷ = 1681791959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681792087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681792027) 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, 39912 + ... + 70402.

It is an arithmetic number, because the mean of its divisors is an integer number (221371920).

Almost surely, 2^1681792087 is an apocalyptic number.

1681792087 is a deficient number, since it is larger than the sum of its proper divisors (89183273).

1681792087 is a wasteful number, since it uses less digits than its factorization.

1681792087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33413.

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 1681792087 is about 41009.6584599287. The cubic root of 1681792087 is about 1189.2069397563.

The spelling of 1681792087 in words is "one billion, six hundred eighty-one million, seven hundred ninety-two thousand, eighty-seven".