146989 has 2 divisors, whose sum is σ = 146990. Its totient is φ = 146988.

The previous prime is 146987. The next prime is 147011. The reversal of 146989 is 989641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110889 + 36100 = 333^2 + 190^2 .

It is an emirp because it is prime and its reverse (989641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146989 - 2¹ = 146987 is a prime.

It is a super-2 number, since 2×146989² = 43211532242, which contains 22 as substring.

Together with 146987, it forms a pair of twin primes.

146989 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73494 + 73495.

It is an arithmetic number, because the mean of its divisors is an integer number (73495).

2¹⁴⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

146989 is a deficient number, since it is larger than the sum of its proper divisors (1).

146989 is an equidigital number, since it uses as much as digits as its factorization.

146989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 146989 is about 383.3914448706. The cubic root of 146989 is about 52.7750044300.

The spelling of 146989 in words is "one hundred forty-six thousand, nine hundred eighty-nine".