172099921703 has 2 divisors, whose sum is σ = 172099921704. Its totient is φ = 172099921702.

The previous prime is 172099921663. The next prime is 172099921729. The reversal of 172099921703 is 307129990271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172099921703 - 2¹⁰ = 172099920679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172099921733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86049960851 + 86049960852.

It is an arithmetic number, because the mean of its divisors is an integer number (86049960852).

Almost surely, 2^172099921703 is an apocalyptic number.

172099921703 is a deficient number, since it is larger than the sum of its proper divisors (1).

172099921703 is an equidigital number, since it uses as much as digits as its factorization.

172099921703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 172099921703 in words is "one hundred seventy-two billion, ninety-nine million, nine hundred twenty-one thousand, seven hundred three".