8277778097 has 2 divisors, whose sum is σ = 8277778098. Its totient is φ = 8277778096.

The previous prime is 8277778087. The next prime is 8277778123. The reversal of 8277778097 is 7908777728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6403840576 + 1873937521 = 80024^2 + 43289^2 .

It is a cyclic number.

It is not a de Polignac number, because 8277778097 - 2¹⁶ = 8277712561 is a prime.

It is a super-2 number, since 2×8277778097² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8277778027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4138889048 + 4138889049.

It is an arithmetic number, because the mean of its divisors is an integer number (4138889049).

Almost surely, 2^8277778097 is an apocalyptic number.

It is an amenable number.

8277778097 is a deficient number, since it is larger than the sum of its proper divisors (1).

8277778097 is an equidigital number, since it uses as much as digits as its factorization.

8277778097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19361664, while the sum is 62.

The square root of 8277778097 is about 90982.2955140175. The cubic root of 8277778097 is about 2022.8853072813.

The spelling of 8277778097 in words is "eight billion, two hundred seventy-seven million, seven hundred seventy-eight thousand, ninety-seven".