1670535389 has 2 divisors, whose sum is σ = 1670535390. Its totient is φ = 1670535388.

The previous prime is 1670535359. The next prime is 1670535407. The reversal of 1670535389 is 9835350761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1372109764 + 298425625 = 37042^2 + 17275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670535389 - 2²⁴ = 1653758173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670535359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835267694 + 835267695.

It is an arithmetic number, because the mean of its divisors is an integer number (835267695).

Almost surely, 2^1670535389 is an apocalyptic number.

It is an amenable number.

1670535389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670535389 is an equidigital number, since it uses as much as digits as its factorization.

1670535389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 1670535389 is about 40872.1835604608. The cubic root of 1670535389 is about 1186.5477681007.

The spelling of 1670535389 in words is "one billion, six hundred seventy million, five hundred thirty-five thousand, three hundred eighty-nine".