1582680779 has 2 divisors, whose sum is σ = 1582680780. Its totient is φ = 1582680778.

The previous prime is 1582680721. The next prime is 1582680797. The reversal of 1582680779 is 9770862851.

Together with next prime (1582680797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1582680779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1582680779.

It is not a weakly prime, because it can be changed into another prime (1582680709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791340389 + 791340390.

It is an arithmetic number, because the mean of its divisors is an integer number (791340390).

Almost surely, 2^1582680779 is an apocalyptic number.

1582680779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1582680779 is an equidigital number, since it uses as much as digits as its factorization.

1582680779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The square root of 1582680779 is about 39782.9206946901. The cubic root of 1582680779 is about 1165.3716336026.

The spelling of 1582680779 in words is "one billion, five hundred eighty-two million, six hundred eighty thousand, seven hundred seventy-nine".