172315853 has 2 divisors, whose sum is σ = 172315854. Its totient is φ = 172315852.

The previous prime is 172315783. The next prime is 172315867. The reversal of 172315853 is 358513271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124055044 + 48260809 = 11138^2 + 6947^2 .

It is a cyclic number.

It is not a de Polignac number, because 172315853 - 2⁸ = 172315597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172315753) 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, 86157926 + 86157927.

It is an arithmetic number, because the mean of its divisors is an integer number (86157927).

Almost surely, 2^172315853 is an apocalyptic number.

It is an amenable number.

172315853 is a deficient number, since it is larger than the sum of its proper divisors (1).

172315853 is an equidigital number, since it uses as much as digits as its factorization.

172315853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 172315853 is about 13126.9133081620. The cubic root of 172315853 is about 556.4699856562.

It can be divided in two parts, 1723 and 15853, that added together give a cube (17576 = 26³).

The spelling of 172315853 in words is "one hundred seventy-two million, three hundred fifteen thousand, eight hundred fifty-three".