146639 has 2 divisors, whose sum is σ = 146640. Its totient is φ = 146638.

The previous prime is 146617. The next prime is 146647. The reversal of 146639 is 936641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 146639 - 2⁸ = 146383 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73319 + 73320.

It is an arithmetic number, because the mean of its divisors is an integer number (73320).

2¹⁴⁶⁶³⁹ is an apocalyptic number.

146639 is a deficient number, since it is larger than the sum of its proper divisors (1).

146639 is an equidigital number, since it uses as much as digits as its factorization.

146639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 146639 is about 382.9347202853. The cubic root of 146639 is about 52.7330830804.

The spelling of 146639 in words is "one hundred forty-six thousand, six hundred thirty-nine".