172069811 has 2 divisors, whose sum is σ = 172069812. Its totient is φ = 172069810.

The previous prime is 172069771. The next prime is 172069813. The reversal of 172069811 is 118960271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172069811 - 2¹⁸ = 171807667 is a prime.

Together with 172069813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172069813) 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, 86034905 + 86034906.

It is an arithmetic number, because the mean of its divisors is an integer number (86034906).

Almost surely, 2^172069811 is an apocalyptic number.

172069811 is a deficient number, since it is larger than the sum of its proper divisors (1).

172069811 is an equidigital number, since it uses as much as digits as its factorization.

172069811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 172069811 is about 13117.5382980192. The cubic root of 172069811 is about 556.2050067382.

The spelling of 172069811 in words is "one hundred seventy-two million, sixty-nine thousand, eight hundred eleven".