1601309 has 2 divisors, whose sum is σ = 1601310. Its totient is φ = 1601308.

The previous prime is 1601287. The next prime is 1601317. The reversal of 1601309 is 9031061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 38809 = 1250^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601309 - 2¹⁶ = 1535773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800654 + 800655.

It is an arithmetic number, because the mean of its divisors is an integer number (800655).

2^1601309 is an apocalyptic number.

It is an amenable number.

1601309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601309 is an equidigital number, since it uses as much as digits as its factorization.

1601309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1601309 is about 1265.4283859626. The cubic root of 1601309 is about 116.9925969943.

The spelling of 1601309 in words is "one million, six hundred one thousand, three hundred nine".