172094389 has 2 divisors, whose sum is σ = 172094390. Its totient is φ = 172094388.

The previous prime is 172094387. The next prime is 172094407. The reversal of 172094389 is 983490271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133864900 + 38229489 = 11570^2 + 6183^2 .

It is a cyclic number.

It is not a de Polignac number, because 172094389 - 2¹ = 172094387 is a prime.

Together with 172094387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172094387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86047194 + 86047195.

It is an arithmetic number, because the mean of its divisors is an integer number (86047195).

Almost surely, 2^172094389 is an apocalyptic number.

It is an amenable number.

172094389 is a deficient number, since it is larger than the sum of its proper divisors (1).

172094389 is an equidigital number, since it uses as much as digits as its factorization.

172094389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 172094389 is about 13118.4751019316. The cubic root of 172094389 is about 556.2314877650.

The spelling of 172094389 in words is "one hundred seventy-two million, ninety-four thousand, three hundred eighty-nine".