1620104669 has 2 divisors, whose sum is σ = 1620104670. Its totient is φ = 1620104668.

The previous prime is 1620104579. The next prime is 1620104677. The reversal of 1620104669 is 9664010261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1434136900 + 185967769 = 37870^2 + 13637^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620104669 - 2⁸ = 1620104413 is a prime.

It is a super-2 number, since 2×1620104669² = 5249478277031199122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620104569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810052334 + 810052335.

It is an arithmetic number, because the mean of its divisors is an integer number (810052335).

Almost surely, 2^1620104669 is an apocalyptic number.

It is an amenable number.

1620104669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620104669 is an equidigital number, since it uses as much as digits as its factorization.

1620104669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1620104669 is about 40250.5238351006. The cubic root of 1620104669 is about 1174.4855859591.

The spelling of 1620104669 in words is "one billion, six hundred twenty million, one hundred four thousand, six hundred sixty-nine".