162942509 has 2 divisors, whose sum is σ = 162942510. Its totient is φ = 162942508.

The previous prime is 162942463. The next prime is 162942517. The reversal of 162942509 is 905249261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141086884 + 21855625 = 11878^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 162942509 - 2⁸ = 162942253 is a prime.

It is a super-2 number, since 2×162942509² = 53100522478430162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162942599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81471254 + 81471255.

It is an arithmetic number, because the mean of its divisors is an integer number (81471255).

Almost surely, 2^162942509 is an apocalyptic number.

It is an amenable number.

162942509 is a deficient number, since it is larger than the sum of its proper divisors (1).

162942509 is an equidigital number, since it uses as much as digits as its factorization.

162942509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 162942509 is about 12764.8936149112. The cubic root of 162942509 is about 546.1913271257.

The spelling of 162942509 in words is "one hundred sixty-two million, nine hundred forty-two thousand, five hundred nine".