146898721 has 4 divisors (see below), whose sum is σ = 147513600. Its totient is φ = 146283844.

The previous prime is 146898701. The next prime is 146898727. The reversal of 146898721 is 127898641.

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 146898721 - 2⁷ = 146898593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146898727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307081 + ... + 307558.

It is an arithmetic number, because the mean of its divisors is an integer number (36878400).

Almost surely, 2^146898721 is an apocalyptic number.

It is an amenable number.

146898721 is a deficient number, since it is larger than the sum of its proper divisors (614879).

146898721 is an equidigital number, since it uses as much as digits as its factorization.

146898721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614878.

The product of its digits is 193536, while the sum is 46.

The square root of 146898721 is about 12120.1782577650. The cubic root of 146898721 is about 527.6419761142.

The spelling of 146898721 in words is "one hundred forty-six million, eight hundred ninety-eight thousand, seven hundred twenty-one".