1005400079 has 2 divisors, whose sum is σ = 1005400080. Its totient is φ = 1005400078.

The previous prime is 1005400051. The next prime is 1005400087. The reversal of 1005400079 is 9700045001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1005400079 - 2²⁰ = 1004351503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005400049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502700039 + 502700040.

It is an arithmetic number, because the mean of its divisors is an integer number (502700040).

Almost surely, 2^1005400079 is an apocalyptic number.

1005400079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005400079 is an equidigital number, since it uses as much as digits as its factorization.

1005400079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1005400079 is about 31708.0443893975. The cubic root of 1005400079 is about 1001.7967959241.

The spelling of 1005400079 in words is "one billion, five million, four hundred thousand, seventy-nine".