172121063 has 2 divisors, whose sum is σ = 172121064. Its totient is φ = 172121062.

The previous prime is 172121023. The next prime is 172121071. The reversal of 172121063 is 360121271.

It is a strong prime.

It is an emirp because it is prime and its reverse (360121271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172121063 - 2²⁴ = 155343847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86060531 + 86060532.

It is an arithmetic number, because the mean of its divisors is an integer number (86060532).

Almost surely, 2^172121063 is an apocalyptic number.

172121063 is a deficient number, since it is larger than the sum of its proper divisors (1).

172121063 is an equidigital number, since it uses as much as digits as its factorization.

172121063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 172121063 is about 13119.4917203373. The cubic root of 172121063 is about 556.2602242282.

The spelling of 172121063 in words is "one hundred seventy-two million, one hundred twenty-one thousand, sixty-three".