172722069 has 24 divisors (see below), whose sum is σ = 270106200. Its totient is φ = 105725952.

The previous prime is 172722041. The next prime is 172722097. The reversal of 172722069 is 960227271.

172722069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (172722041) and next prime (172722097).

It can be written as a sum of positive squares in 4 ways, for example, as 8625969 + 164096100 = 2937^2 + 12810^2 .

It is not a de Polignac number, because 172722069 - 2¹² = 172717973 is a prime.

It is a super-2 number, since 2×172722069² = 59665826239281522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172722029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18757 + ... + 26405.

It is an arithmetic number, because the mean of its divisors is an integer number (11254425).

Almost surely, 2^172722069 is an apocalyptic number.

It is an amenable number.

172722069 is a deficient number, since it is larger than the sum of its proper divisors (97384131).

172722069 is a wasteful number, since it uses less digits than its factorization.

172722069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861 (or 7858 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 172722069 is about 13142.3768398262. The cubic root of 172722069 is about 556.9069151143.

The spelling of 172722069 in words is "one hundred seventy-two million, seven hundred twenty-two thousand, sixty-nine".