172736513 has 4 divisors (see below), whose sum is σ = 172762800. Its totient is φ = 172710228.

The previous prime is 172736497. The next prime is 172736527. The reversal of 172736513 is 315637271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 315637271 = 1483 ⋅212837.

It is a cyclic number.

It is not a de Polignac number, because 172736513 - 2⁴ = 172736497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172730513) 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, 6506 + ... + 19692.

It is an arithmetic number, because the mean of its divisors is an integer number (43190700).

It is a Proth number, since it is equal to 10543 ⋅ 2¹⁴ + 1 and 10543 < 2¹⁴.

Almost surely, 2^172736513 is an apocalyptic number.

It is an amenable number.

172736513 is a deficient number, since it is larger than the sum of its proper divisors (26287).

172736513 is a wasteful number, since it uses less digits than its factorization.

172736513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26286.

The product of its digits is 26460, while the sum is 35.

The square root of 172736513 is about 13142.9263484203. The cubic root of 172736513 is about 556.9224385876.

The spelling of 172736513 in words is "one hundred seventy-two million, seven hundred thirty-six thousand, five hundred thirteen".