1601788469 has 2 divisors, whose sum is σ = 1601788470. Its totient is φ = 1601788468.

The previous prime is 1601788429. The next prime is 1601788493. The reversal of 1601788469 is 9648871061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420536100 + 181252369 = 37690^2 + 13463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601788469 - 2²⁸ = 1333353013 is a prime.

It is a super-2 number, since 2×1601788469² = 5131452598842727922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601788429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800894234 + 800894235.

It is an arithmetic number, because the mean of its divisors is an integer number (800894235).

Almost surely, 2^1601788469 is an apocalyptic number.

It is an amenable number.

1601788469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601788469 is an equidigital number, since it uses as much as digits as its factorization.

1601788469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 1601788469 is about 40022.3496186818. The cubic root of 1601788469 is about 1170.0427259338.

The spelling of 1601788469 in words is "one billion, six hundred one million, seven hundred eighty-eight thousand, four hundred sixty-nine".