817136077 has 2 divisors, whose sum is σ = 817136078. Its totient is φ = 817136076.

The previous prime is 817136069. The next prime is 817136101. The reversal of 817136077 is 770631718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810028521 + 7107556 = 28461^2 + 2666^2 .

It is a cyclic number.

It is not a de Polignac number, because 817136077 - 2³ = 817136069 is a prime.

It is a super-2 number, since 2×817136077² = 1335422736669899858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817130077) 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, 408568038 + 408568039.

It is an arithmetic number, because the mean of its divisors is an integer number (408568039).

Almost surely, 2^817136077 is an apocalyptic number.

It is an amenable number.

817136077 is a deficient number, since it is larger than the sum of its proper divisors (1).

817136077 is an equidigital number, since it uses as much as digits as its factorization.

817136077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 817136077 is about 28585.5921226061. The cubic root of 817136077 is about 934.8992149271.

The spelling of 817136077 in words is "eight hundred seventeen million, one hundred thirty-six thousand, seventy-seven".