146131809 has 4 divisors (see below), whose sum is σ = 194842416. Its totient is φ = 97421204.

The previous prime is 146131807. The next prime is 146131823. The reversal of 146131809 is 908131641.

146131809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146131809 - 2¹ = 146131807 is a prime.

It is a super-2 number, since 2×146131809² = 42709011203224962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 146131809.

It is not an unprimeable number, because it can be changed into a prime (146131801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24355299 + ... + 24355304.

It is an arithmetic number, because the mean of its divisors is an integer number (48710604).

Almost surely, 2^146131809 is an apocalyptic number.

It is an amenable number.

146131809 is a deficient number, since it is larger than the sum of its proper divisors (48710607).

146131809 is an equidigital number, since it uses as much as digits as its factorization.

146131809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48710606.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 146131809 is about 12088.4990383422. The cubic root of 146131809 is about 526.7221559776.

The spelling of 146131809 in words is "one hundred forty-six million, one hundred thirty-one thousand, eight hundred nine".