172133947 has 2 divisors, whose sum is σ = 172133948. Its totient is φ = 172133946.

The previous prime is 172133933. The next prime is 172133957. The reversal of 172133947 is 749331271.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172133947 is a prime.

It is not a weakly prime, because it can be changed into another prime (172133957) 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, 86066973 + 86066974.

It is an arithmetic number, because the mean of its divisors is an integer number (86066974).

Almost surely, 2^172133947 is an apocalyptic number.

172133947 is a deficient number, since it is larger than the sum of its proper divisors (1).

172133947 is an equidigital number, since it uses as much as digits as its factorization.

172133947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 172133947 is about 13119.9827362691. The cubic root of 172133947 is about 556.2741033700.

The spelling of 172133947 in words is "one hundred seventy-two million, one hundred thirty-three thousand, nine hundred forty-seven".