1042385779 has 2 divisors, whose sum is σ = 1042385780. Its totient is φ = 1042385778.

The previous prime is 1042385759. The next prime is 1042385797. The reversal of 1042385779 is 9775832401.

Together with next prime (1042385797) 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-1042385779 is a prime.

It is a super-2 number, since 2×1042385779² = 2173136224522873682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1042385759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521192889 + 521192890.

It is an arithmetic number, because the mean of its divisors is an integer number (521192890).

Almost surely, 2^1042385779 is an apocalyptic number.

1042385779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042385779 is an equidigital number, since it uses as much as digits as its factorization.

1042385779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 1042385779 is about 32285.9997367280. Note that the first 3 decimals coincide. The cubic root of 1042385779 is about 1013.9335475490.

The spelling of 1042385779 in words is "one billion, forty-two million, three hundred eighty-five thousand, seven hundred seventy-nine".