172092121 has 2 divisors, whose sum is σ = 172092122. Its totient is φ = 172092120.

The previous prime is 172092103. The next prime is 172092127. The reversal of 172092121 is 121290271.

172092121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167832025 + 4260096 = 12955^2 + 2064^2 .

It is a cyclic number.

It is not a de Polignac number, because 172092121 - 2⁷ = 172091993 is a prime.

It is a super-2 number, since 2×172092121² = 59231396220557282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172092127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86046060 + 86046061.

It is an arithmetic number, because the mean of its divisors is an integer number (86046061).

Almost surely, 2^172092121 is an apocalyptic number.

It is an amenable number.

172092121 is a deficient number, since it is larger than the sum of its proper divisors (1).

172092121 is an equidigital number, since it uses as much as digits as its factorization.

172092121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 172092121 is about 13118.3886586730. The cubic root of 172092121 is about 556.2290442638.

The spelling of 172092121 in words is "one hundred seventy-two million, ninety-two thousand, one hundred twenty-one".