1670881639 has 8 divisors (see below), whose sum is σ = 1931035680. Its totient is φ = 1416091776.

The previous prime is 1670881633. The next prime is 1670881643. The reversal of 1670881639 is 9361880761.

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 1670881639 - 2⁵ = 1670881607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1670881592 and 1670881601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670881633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340374 + ... + 1341619.

It is an arithmetic number, because the mean of its divisors is an integer number (241379460).

Almost surely, 2^1670881639 is an apocalyptic number.

1670881639 is a deficient number, since it is larger than the sum of its proper divisors (260154041).

1670881639 is an equidigital number, since it uses as much as digits as its factorization.

1670881639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682089.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1670881639 is about 40876.4191068640. The cubic root of 1670881639 is about 1186.6297405801.

The spelling of 1670881639 in words is "one billion, six hundred seventy million, eight hundred eighty-one thousand, six hundred thirty-nine".