172330378973 has 4 divisors (see below), whose sum is σ = 177889423488. Its totient is φ = 166771334460.

The previous prime is 172330378943. The next prime is 172330378981. The reversal of 172330378973 is 379873033271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172330378973 - 2¹² = 172330374877 is a prime.

It is a super-3 number, since 3×172330378973³ (a number of 35 digits) contains 333 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 (172330378943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779522211 + ... + 2779522272.

It is an arithmetic number, because the mean of its divisors is an integer number (44472355872).

Almost surely, 2^172330378973 is an apocalyptic number.

It is an amenable number.

172330378973 is a deficient number, since it is larger than the sum of its proper divisors (5559044515).

172330378973 is an equidigital number, since it uses as much as digits as its factorization.

172330378973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559044514.

The product of its (nonzero) digits is 4000752, while the sum is 53.

The spelling of 172330378973 in words is "one hundred seventy-two billion, three hundred thirty million, three hundred seventy-eight thousand, nine hundred seventy-three".