830778061 has 2 divisors, whose sum is σ = 830778062. Its totient is φ = 830778060.

The previous prime is 830778023. The next prime is 830778089. The reversal of 830778061 is 160877038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 720654025 + 110124036 = 26845^2 + 10494^2 .

It is a cyclic number.

It is not a de Polignac number, because 830778061 - 2¹³ = 830769869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (830778461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415389030 + 415389031.

It is an arithmetic number, because the mean of its divisors is an integer number (415389031).

Almost surely, 2^830778061 is an apocalyptic number.

It is an amenable number.

830778061 is a deficient number, since it is larger than the sum of its proper divisors (1).

830778061 is an equidigital number, since it uses as much as digits as its factorization.

830778061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 830778061 is about 28823.2208644350. The cubic root of 830778061 is about 940.0732027645.

It can be divided in two parts, 8307 and 78061, that added together give a palindrome (86368).

The spelling of 830778061 in words is "eight hundred thirty million, seven hundred seventy-eight thousand, sixty-one".