1606497401 has 2 divisors, whose sum is σ = 1606497402. Its totient is φ = 1606497400.

The previous prime is 1606497397. The next prime is 1606497439. The reversal of 1606497401 is 1047946061.

It is a happy number.

It is an a-pointer prime, because the next prime (1606497439) can be obtained adding 1606497401 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600000000 + 6497401 = 40000^2 + 2549^2 .

It is an emirp because it is prime and its reverse (1047946061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1606497401 - 2² = 1606497397 is a prime.

It is not a weakly prime, because it can be changed into another prime (1606497461) 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 as a sum of consecutive naturals, namely, 803248700 + 803248701.

It is an arithmetic number, because the mean of its divisors is an integer number (803248701).

Almost surely, 2^1606497401 is an apocalyptic number.

It is an amenable number.

1606497401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606497401 is an equidigital number, since it uses as much as digits as its factorization.

1606497401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1606497401 is about 40081.1352259389. The cubic root of 1606497401 is about 1171.1881666825.

The spelling of 1606497401 in words is "one billion, six hundred six million, four hundred ninety-seven thousand, four hundred one".