1670421359 has 4 divisors (see below), whose sum is σ = 1671052704. Its totient is φ = 1669790016.

The previous prime is 1670421317. The next prime is 1670421451. The reversal of 1670421359 is 9531240761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9531240761 = 7 ⋅1361605823.

It is a cyclic number.

It is not a de Polignac number, because 1670421359 - 2²⁴ = 1653644143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670424359) 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 3 ways as a sum of consecutive naturals, for example, 311687 + ... + 317000.

It is an arithmetic number, because the mean of its divisors is an integer number (417763176).

Almost surely, 2^1670421359 is an apocalyptic number.

1670421359 is a deficient number, since it is larger than the sum of its proper divisors (631345).

1670421359 is an equidigital number, since it uses as much as digits as its factorization.

1670421359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631344.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1670421359 is about 40870.7885781520. The cubic root of 1670421359 is about 1186.5207697461.

The spelling of 1670421359 in words is "one billion, six hundred seventy million, four hundred twenty-one thousand, three hundred fifty-nine".