172286047 has 2 divisors, whose sum is σ = 172286048. Its totient is φ = 172286046.

The previous prime is 172285979. The next prime is 172286083. The reversal of 172286047 is 740682271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172286047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172285997 and 172286015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172286087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86143023 + 86143024.

It is an arithmetic number, because the mean of its divisors is an integer number (86143024).

Almost surely, 2^172286047 is an apocalyptic number.

172286047 is a deficient number, since it is larger than the sum of its proper divisors (1).

172286047 is an equidigital number, since it uses as much as digits as its factorization.

172286047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 172286047 is about 13125.7779578964. Note that the first 3 decimals coincide. The cubic root of 172286047 is about 556.4378990345.

The spelling of 172286047 in words is "one hundred seventy-two million, two hundred eighty-six thousand, forty-seven".