1639425023 has 2 divisors, whose sum is σ = 1639425024. Its totient is φ = 1639425022.

The previous prime is 1639425019. The next prime is 1639425037. The reversal of 1639425023 is 3205249361.

It is a weak prime.

It is an emirp because it is prime and its reverse (3205249361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1639425023 - 2² = 1639425019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1639425043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819712511 + 819712512.

It is an arithmetic number, because the mean of its divisors is an integer number (819712512).

Almost surely, 2^1639425023 is an apocalyptic number.

1639425023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639425023 is an equidigital number, since it uses as much as digits as its factorization.

1639425023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1639425023 is about 40489.8138177987. The cubic root of 1639425023 is about 1179.1358757755.

The spelling of 1639425023 in words is "one billion, six hundred thirty-nine million, four hundred twenty-five thousand, twenty-three".