172893109847 has 2 divisors, whose sum is σ = 172893109848. Its totient is φ = 172893109846.

The previous prime is 172893109819. The next prime is 172893109853. The reversal of 172893109847 is 748901398271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172893109847 - 2¹⁴ = 172893093463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172893109867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86446554923 + 86446554924.

It is an arithmetic number, because the mean of its divisors is an integer number (86446554924).

Almost surely, 2^172893109847 is an apocalyptic number.

172893109847 is a deficient number, since it is larger than the sum of its proper divisors (1).

172893109847 is an equidigital number, since it uses as much as digits as its factorization.

172893109847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 172893109847 in words is "one hundred seventy-two billion, eight hundred ninety-three million, one hundred nine thousand, eight hundred forty-seven".