172196377 has 6 divisors (see below), whose sum is σ = 180009242. Its totient is φ = 164709072.

The previous prime is 172196333. The next prime is 172196407. The reversal of 172196377 is 773691271.

It can be written as a sum of positive squares in only one way, i.e., 144696841 + 27499536 = 12029^2 + 5244^2 .

It is not a de Polignac number, because 172196377 - 2⁷ = 172196249 is a prime.

It is a super-2 number, since 2×172196377² = 59303184503852258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172196177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162228 + ... + 163285.

Almost surely, 2^172196377 is an apocalyptic number.

It is an amenable number.

172196377 is a deficient number, since it is larger than the sum of its proper divisors (7812865).

172196377 is an equidigital number, since it uses as much as digits as its factorization.

172196377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325559 (or 325536 counting only the distinct ones).

The product of its digits is 111132, while the sum is 43.

The square root of 172196377 is about 13122.3617157888. The cubic root of 172196377 is about 556.3413455677.

The spelling of 172196377 in words is "one hundred seventy-two million, one hundred ninety-six thousand, three hundred seventy-seven".