146389909 has 2 divisors, whose sum is σ = 146389910. Its totient is φ = 146389908.

The previous prime is 146389897. The next prime is 146389933. The reversal of 146389909 is 909983641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126112900 + 20277009 = 11230^2 + 4503^2 .

It is a cyclic number.

It is not a de Polignac number, because 146389909 - 2²³ = 138001301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146389949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73194954 + 73194955.

It is an arithmetic number, because the mean of its divisors is an integer number (73194955).

Almost surely, 2^146389909 is an apocalyptic number.

It is an amenable number.

146389909 is a deficient number, since it is larger than the sum of its proper divisors (1).

146389909 is an equidigital number, since it uses as much as digits as its factorization.

146389909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 146389909 is about 12099.1697649054. The cubic root of 146389909 is about 527.0320748805.

The spelling of 146389909 in words is "one hundred forty-six million, three hundred eighty-nine thousand, nine hundred nine".