169772172983 has 4 divisors (see below), whose sum is σ = 194025340560. Its totient is φ = 145519005408.

The previous prime is 169772172949. The next prime is 169772173007. The reversal of 169772172983 is 389271277961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389271277961 = 466273 ⋅834857.

It is a de Polignac number, because none of the positive numbers 2^k-169772172983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169772132983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12126583778 + ... + 12126583791.

It is an arithmetic number, because the mean of its divisors is an integer number (48506335140).

Almost surely, 2^169772172983 is an apocalyptic number.

169772172983 is a deficient number, since it is larger than the sum of its proper divisors (24253167577).

169772172983 is an equidigital number, since it uses as much as digits as its factorization.

169772172983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24253167576.

The product of its digits is 16003008, while the sum is 62.

The spelling of 169772172983 in words is "one hundred sixty-nine billion, seven hundred seventy-two million, one hundred seventy-two thousand, nine hundred eighty-three".