172220377 has 8 divisors (see below), whose sum is σ = 201624192. Its totient is φ = 144016800.

The previous prime is 172220339. The next prime is 172220393. The reversal of 172220377 is 773022271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172220377 - 2¹¹ = 172218329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172220777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299749 + ... + 300322.

It is an arithmetic number, because the mean of its divisors is an integer number (25203024).

Almost surely, 2^172220377 is an apocalyptic number.

It is an amenable number.

172220377 is a deficient number, since it is larger than the sum of its proper divisors (29403815).

172220377 is an equidigital number, since it uses as much as digits as its factorization.

172220377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600119.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 172220377 is about 13123.2761534611. The cubic root of 172220377 is about 556.3671911986.

The spelling of 172220377 in words is "one hundred seventy-two million, two hundred twenty thousand, three hundred seventy-seven".