80123777 has 2 divisors, whose sum is σ = 80123778. Its totient is φ = 80123776.

The previous prime is 80123689. The next prime is 80123821. The reversal of 80123777 is 77732108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74666881 + 5456896 = 8641^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 80123777 - 2¹² = 80119681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80123177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40061888 + 40061889.

It is an arithmetic number, because the mean of its divisors is an integer number (40061889).

Almost surely, 2^80123777 is an apocalyptic number.

It is an amenable number.

80123777 is a deficient number, since it is larger than the sum of its proper divisors (1).

80123777 is an equidigital number, since it uses as much as digits as its factorization.

80123777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 80123777 is about 8951.1885802948. The cubic root of 80123777 is about 431.1090480474.

The spelling of 80123777 in words is "eighty million, one hundred twenty-three thousand, seven hundred seventy-seven".