11978129 has 2 divisors, whose sum is σ = 11978130. Its totient is φ = 11978128.

The previous prime is 11978117. The next prime is 11978137. The reversal of 11978129 is 92187911.

11978129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 1317904 = 3265^2 + 1148^2 .

It is a cyclic number.

It is not a de Polignac number, because 11978129 - 2¹² = 11974033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11978092 and 11978101.

It is not a weakly prime, because it can be changed into another prime (11978429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5989064 + 5989065.

It is an arithmetic number, because the mean of its divisors is an integer number (5989065).

Almost surely, 2^11978129 is an apocalyptic number.

It is an amenable number.

11978129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11978129 is an equidigital number, since it uses as much as digits as its factorization.

11978129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 38.

The square root of 11978129 is about 3460.9433685052. The cubic root of 11978129 is about 228.8036747845.

The spelling of 11978129 in words is "eleven million, nine hundred seventy-eight thousand, one hundred twenty-nine".