146447809 has 16 divisors (see below), whose sum is σ = 160522560. Its totient is φ = 133056000.

The previous prime is 146447789. The next prime is 146447827. The reversal of 146447809 is 908744641.

146447809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 146447809 - 2⁷ = 146447681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146447849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63934 + ... + 66184.

It is an arithmetic number, because the mean of its divisors is an integer number (10032660).

Almost surely, 2^146447809 is an apocalyptic number.

146447809 is the 7654-th heptagonal number.

It is an amenable number.

146447809 is a deficient number, since it is larger than the sum of its proper divisors (14074751).

146447809 is a wasteful number, since it uses less digits than its factorization.

146447809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 146447809 is about 12101.5622545190. The cubic root of 146447809 is about 527.1015494663.

The spelling of 146447809 in words is "one hundred forty-six million, four hundred forty-seven thousand, eight hundred nine".