780683081 has 2 divisors, whose sum is σ = 780683082. Its totient is φ = 780683080.

The previous prime is 780682999. The next prime is 780683093. The reversal of 780683081 is 180386087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552673081 + 228010000 = 23509^2 + 15100^2 .

It is a cyclic number.

It is not a de Polignac number, because 780683081 - 2¹⁴ = 780666697 is a prime.

It is a super-2 number, since 2×780683081² = 1218932145919305122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (780683581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390341540 + 390341541.

It is an arithmetic number, because the mean of its divisors is an integer number (390341541).

Almost surely, 2^780683081 is an apocalyptic number.

It is an amenable number.

780683081 is a deficient number, since it is larger than the sum of its proper divisors (1).

780683081 is an equidigital number, since it uses as much as digits as its factorization.

780683081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 780683081 is about 27940.7065229210. The cubic root of 780683081 is about 920.7850423565.

The spelling of 780683081 in words is "seven hundred eighty million, six hundred eighty-three thousand, eighty-one".