1620496873 has 2 divisors, whose sum is σ = 1620496874. Its totient is φ = 1620496872.

The previous prime is 1620496853. The next prime is 1620496877. The reversal of 1620496873 is 3786940261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263589209 + 356907664 = 35547^2 + 18892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620496873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620496877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810248436 + 810248437.

It is an arithmetic number, because the mean of its divisors is an integer number (810248437).

Almost surely, 2^1620496873 is an apocalyptic number.

It is an amenable number.

1620496873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620496873 is an equidigital number, since it uses as much as digits as its factorization.

1620496873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1620496873 is about 40255.3955762454. The cubic root of 1620496873 is about 1174.5803536588.

The spelling of 1620496873 in words is "one billion, six hundred twenty million, four hundred ninety-six thousand, eight hundred seventy-three".