1601969 has 2 divisors, whose sum is σ = 1601970. Its totient is φ = 1601968.

The previous prime is 1601953. The next prime is 1602011. The reversal of 1601969 is 9691061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 113569 = 1220^2 + 337^2 .

It is an emirp because it is prime and its reverse (9691061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1601969 - 2⁴ = 1601953 is a prime.

It is a super-3 number, since 3×1601969³ = 12333421611139608627, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1601269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800984 + 800985.

It is an arithmetic number, because the mean of its divisors is an integer number (800985).

2^1601969 is an apocalyptic number.

It is an amenable number.

1601969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601969 is an equidigital number, since it uses as much as digits as its factorization.

1601969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1601969 is about 1265.6891403500. The cubic root of 1601969 is about 117.0086681186.

The spelling of 1601969 in words is "one million, six hundred one thousand, nine hundred sixty-nine".