146809489 has 2 divisors, whose sum is σ = 146809490. Its totient is φ = 146809488.

The previous prime is 146809477. The next prime is 146809499. The reversal of 146809489 is 984908641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144793089 + 2016400 = 12033^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 146809489 - 2⁷ = 146809361 is a prime.

It is a super-2 number, since 2×146809489² = 43106052120882242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (146809499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73404744 + 73404745.

It is an arithmetic number, because the mean of its divisors is an integer number (73404745).

Almost surely, 2^146809489 is an apocalyptic number.

It is an amenable number.

146809489 is a deficient number, since it is larger than the sum of its proper divisors (1).

146809489 is an equidigital number, since it uses as much as digits as its factorization.

146809489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 146809489 is about 12116.4965646015. The cubic root of 146809489 is about 527.5351177177.

The spelling of 146809489 in words is "one hundred forty-six million, eight hundred nine thousand, four hundred eighty-nine".