172400379 has 8 divisors (see below), whose sum is σ = 232636992. Its totient is φ = 113548680.

The previous prime is 172400369. The next prime is 172400401. The reversal of 172400379 is 973004271.

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

It is not a de Polignac number, because 172400379 - 2⁴ = 172400363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172400309) 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, 345937 + ... + 346434.

It is an arithmetic number, because the mean of its divisors is an integer number (29079624).

Almost surely, 2^172400379 is an apocalyptic number.

172400379 is a deficient number, since it is larger than the sum of its proper divisors (60236613).

172400379 is an equidigital number, since it uses as much as digits as its factorization.

172400379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692457.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 172400379 is about 13130.1324821953. The cubic root of 172400379 is about 556.5609590875.

The spelling of 172400379 in words is "one hundred seventy-two million, four hundred thousand, three hundred seventy-nine".