172537427 has 2 divisors, whose sum is σ = 172537428. Its totient is φ = 172537426.

The previous prime is 172537373. The next prime is 172537429. The reversal of 172537427 is 724735271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172537427 - 2⁶ = 172537363 is a prime.

Together with 172537429, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_9637067 and since 172537427 and 9637067 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (172537429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86268713 + 86268714.

It is an arithmetic number, because the mean of its divisors is an integer number (86268714).

Almost surely, 2^172537427 is an apocalyptic number.

172537427 is a deficient number, since it is larger than the sum of its proper divisors (1).

172537427 is an equidigital number, since it uses as much as digits as its factorization.

172537427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82320, while the sum is 38.

The square root of 172537427 is about 13135.3502808262. The cubic root of 172537427 is about 556.7083975950.

The spelling of 172537427 in words is "one hundred seventy-two million, five hundred thirty-seven thousand, four hundred twenty-seven".