45478129 has 2 divisors, whose sum is σ = 45478130. Its totient is φ = 45478128.

The previous prime is 45478117. The next prime is 45478163. The reversal of 45478129 is 92187454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40347904 + 5130225 = 6352^2 + 2265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45478129 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 45478091 and 45478100.

It is not a weakly prime, because it can be changed into another prime (45478189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22739064 + 22739065.

It is an arithmetic number, because the mean of its divisors is an integer number (22739065).

Almost surely, 2^45478129 is an apocalyptic number.

It is an amenable number.

45478129 is a deficient number, since it is larger than the sum of its proper divisors (1).

45478129 is an equidigital number, since it uses as much as digits as its factorization.

45478129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 45478129 is about 6743.7474003702. The cubic root of 45478129 is about 356.9446385552.

The spelling of 45478129 in words is "forty-five million, four hundred seventy-eight thousand, one hundred twenty-nine".