146986209 has 18 divisors (see below), whose sum is σ = 214570278. Its totient is φ = 96960000.

The previous prime is 146986207. The next prime is 146986211. The reversal of 146986209 is 902689641.

It is a happy number.

146986209 is a `hidden beast` number, since 14 + 6 + 9 + 8 + 620 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (146986207) and next prime (146986211).

It can be written as a sum of positive squares in 3 ways, for example, as 139712400 + 7273809 = 11820^2 + 2697^2 .

It is not a de Polignac number, because 146986209 - 2¹ = 146986207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146986201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91009 + ... + 92609.

It is an arithmetic number, because the mean of its divisors is an integer number (11920571).

Almost surely, 2^146986209 is an apocalyptic number.

It is an amenable number.

146986209 is a deficient number, since it is larger than the sum of its proper divisors (67584069).

146986209 is a wasteful number, since it uses less digits than its factorization.

146986209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 146986209 is about 12123.7869083880. The cubic root of 146986209 is about 527.7467040057.

It can be divided in two parts, 1469 and 86209, that added together give a palindrome (87678).

The spelling of 146986209 in words is "one hundred forty-six million, nine hundred eighty-six thousand, two hundred nine".