1670702321 has 2 divisors, whose sum is σ = 1670702322. Its totient is φ = 1670702320.

The previous prime is 1670702303. The next prime is 1670702381. The reversal of 1670702321 is 1232070761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1595203600 + 75498721 = 39940^2 + 8689^2 .

It is an emirp because it is prime and its reverse (1232070761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1670702321 - 2²⁶ = 1603593457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670702381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835351160 + 835351161.

It is an arithmetic number, because the mean of its divisors is an integer number (835351161).

Almost surely, 2^1670702321 is an apocalyptic number.

It is an amenable number.

1670702321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670702321 is an equidigital number, since it uses as much as digits as its factorization.

1670702321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 1670702321 is about 40874.2256318086. The cubic root of 1670702321 is about 1186.5872896010.

The spelling of 1670702321 in words is "one billion, six hundred seventy million, seven hundred two thousand, three hundred twenty-one".