172922537 has 2 divisors, whose sum is σ = 172922538. Its totient is φ = 172922536.

The previous prime is 172922527. The next prime is 172922551. The reversal of 172922537 is 735229271.

It is a happy number.

172922537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99580441 + 73342096 = 9979^2 + 8564^2 .

It is a cyclic number.

It is not a de Polignac number, because 172922537 - 2¹⁰ = 172921513 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172922537.

It is not a weakly prime, because it can be changed into another prime (172922507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86461268 + 86461269.

It is an arithmetic number, because the mean of its divisors is an integer number (86461269).

Almost surely, 2^172922537 is an apocalyptic number.

It is an amenable number.

172922537 is a deficient number, since it is larger than the sum of its proper divisors (1).

172922537 is an equidigital number, since it uses as much as digits as its factorization.

172922537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 172922537 is about 13150.0014068440. The cubic root of 172922537 is about 557.1222878070.

The spelling of 172922537 in words is "one hundred seventy-two million, nine hundred twenty-two thousand, five hundred thirty-seven".