16861129 has 2 divisors, whose sum is σ = 16861130. Its totient is φ = 16861128.

The previous prime is 16861111. The next prime is 16861147. The reversal of 16861129 is 92116861.

It is a balanced prime because it is at equal distance from previous prime (16861111) and next prime (16861147).

It can be written as a sum of positive squares in only one way, i.e., 13307904 + 3553225 = 3648^2 + 1885^2 .

It is an emirp because it is prime and its reverse (92116861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16861129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16861094 and 16861103.

It is not a weakly prime, because it can be changed into another prime (16861729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430564 + 8430565.

It is an arithmetic number, because the mean of its divisors is an integer number (8430565).

Almost surely, 2^16861129 is an apocalyptic number.

It is an amenable number.

16861129 is a deficient number, since it is larger than the sum of its proper divisors (1).

16861129 is an equidigital number, since it uses as much as digits as its factorization.

16861129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 16861129 is about 4106.2305098472. The cubic root of 16861129 is about 256.4260939919.

The spelling of 16861129 in words is "sixteen million, eight hundred sixty-one thousand, one hundred twenty-nine".