172739390617903 has 2 divisors, whose sum is σ = 172739390617904. Its totient is φ = 172739390617902.

The previous prime is 172739390617823. The next prime is 172739390617921. The reversal of 172739390617903 is 309716093937271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172739390617903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172739390617933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86369695308951 + 86369695308952.

It is an arithmetic number, because the mean of its divisors is an integer number (86369695308952).

Almost surely, 2^{172739390617903} is an apocalyptic number.

172739390617903 is a deficient number, since it is larger than the sum of its proper divisors (1).

172739390617903 is an equidigital number, since it uses as much as digits as its factorization.

172739390617903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81015228, while the sum is 67.

The spelling of 172739390617903 in words is "one hundred seventy-two trillion, seven hundred thirty-nine billion, three hundred ninety million, six hundred seventeen thousand, nine hundred three".