122400077 has 2 divisors, whose sum is σ = 122400078. Its totient is φ = 122400076.

The previous prime is 122400053. The next prime is 122400149. The reversal of 122400077 is 770004221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122301481 + 98596 = 11059^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 122400077 - 2¹² = 122395981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122400877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61200038 + 61200039.

It is an arithmetic number, because the mean of its divisors is an integer number (61200039).

Almost surely, 2^122400077 is an apocalyptic number.

It is an amenable number.

122400077 is a deficient number, since it is larger than the sum of its proper divisors (1).

122400077 is an equidigital number, since it uses as much as digits as its factorization.

122400077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 122400077 is about 11063.4568286770. The cubic root of 122400077 is about 496.5091202379.

Adding to 122400077 its reverse (770004221), we get a palindrome (892404298).

The spelling of 122400077 in words is "one hundred twenty-two million, four hundred thousand, seventy-seven".