80172529 has 2 divisors, whose sum is σ = 80172530. Its totient is φ = 80172528.

The previous prime is 80172509. The next prime is 80172539. The reversal of 80172529 is 92527108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80138304 + 34225 = 8952^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 80172529 - 2²¹ = 78075377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80172494 and 80172503.

It is not a weakly prime, because it can be changed into another prime (80172509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40086264 + 40086265.

It is an arithmetic number, because the mean of its divisors is an integer number (40086265).

Almost surely, 2^80172529 is an apocalyptic number.

It is an amenable number.

80172529 is a deficient number, since it is larger than the sum of its proper divisors (1).

80172529 is an equidigital number, since it uses as much as digits as its factorization.

80172529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 80172529 is about 8953.9113799501. The cubic root of 80172529 is about 431.1964676533.

The spelling of 80172529 in words is "eighty million, one hundred seventy-two thousand, five hundred twenty-nine".