1005672389 has 2 divisors, whose sum is σ = 1005672390. Its totient is φ = 1005672388.

The previous prime is 1005672379. The next prime is 1005672427. The reversal of 1005672389 is 9832765001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972379489 + 33292900 = 31183^2 + 5770^2 .

It is an emirp because it is prime and its reverse (9832765001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1005672389 - 2⁴ = 1005672373 is a prime.

It is a super-2 number, since 2×1005672389² = 2022753907993934642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005672359) 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, 502836194 + 502836195.

It is an arithmetic number, because the mean of its divisors is an integer number (502836195).

Almost surely, 2^1005672389 is an apocalyptic number.

It is an amenable number.

1005672389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005672389 is an equidigital number, since it uses as much as digits as its factorization.

1005672389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1005672389 is about 31712.3381194134. The cubic root of 1005672389 is about 1001.8872324465.

The spelling of 1005672389 in words is "one billion, five million, six hundred seventy-two thousand, three hundred eighty-nine".