172711541 has 2 divisors, whose sum is σ = 172711542. Its totient is φ = 172711540.

The previous prime is 172711537. The next prime is 172711543. The reversal of 172711541 is 145117271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 42523441 = 11410^2 + 6521^2 .

It is a cyclic number.

It is not a de Polignac number, because 172711541 - 2² = 172711537 is a prime.

Together with 172711543, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_9646220 and since 172711541 and 9646220 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172711543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86355770 + 86355771.

It is an arithmetic number, because the mean of its divisors is an integer number (86355771).

Almost surely, 2^172711541 is an apocalyptic number.

It is an amenable number.

172711541 is a deficient number, since it is larger than the sum of its proper divisors (1).

172711541 is an equidigital number, since it uses as much as digits as its factorization.

172711541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 29.

The square root of 172711541 is about 13141.9762973458. The cubic root of 172711541 is about 556.8955997583.

The spelling of 172711541 in words is "one hundred seventy-two million, seven hundred eleven thousand, five hundred forty-one".