172440329393 has 2 divisors, whose sum is σ = 172440329394. Its totient is φ = 172440329392.

The previous prime is 172440329377. The next prime is 172440329419. The reversal of 172440329393 is 393923044271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147554320384 + 24886009009 = 384128^2 + 157753^2 .

It is a cyclic number.

It is not a de Polignac number, because 172440329393 - 2⁴ = 172440329377 is a prime.

It is not a weakly prime, because it can be changed into another prime (172440322393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86220164696 + 86220164697.

It is an arithmetic number, because the mean of its divisors is an integer number (86220164697).

Almost surely, 2^172440329393 is an apocalyptic number.

It is an amenable number.

172440329393 is a deficient number, since it is larger than the sum of its proper divisors (1).

172440329393 is an equidigital number, since it uses as much as digits as its factorization.

172440329393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 172440329393 in words is "one hundred seventy-two billion, four hundred forty million, three hundred twenty-nine thousand, three hundred ninety-three".