122078149 has 2 divisors, whose sum is σ = 122078150. Its totient is φ = 122078148.

The previous prime is 122078113. The next prime is 122078167. The reversal of 122078149 is 941870221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 1232100 = 10993^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 122078149 - 2¹⁵ = 122045381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122028149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61039074 + 61039075.

It is an arithmetic number, because the mean of its divisors is an integer number (61039075).

Almost surely, 2^122078149 is an apocalyptic number.

It is an amenable number.

122078149 is a deficient number, since it is larger than the sum of its proper divisors (1).

122078149 is an equidigital number, since it uses as much as digits as its factorization.

122078149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 122078149 is about 11048.8980898549. The cubic root of 122078149 is about 496.0734436966.

The spelling of 122078149 in words is "one hundred twenty-two million, seventy-eight thousand, one hundred forty-nine".