146397729 has 4 divisors (see below), whose sum is σ = 195196976. Its totient is φ = 97598484.

The previous prime is 146397707. The next prime is 146397739. The reversal of 146397729 is 927793641.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 927793641 = 3 ⋅309264547.

It is not a de Polignac number, because 146397729 - 2¹² = 146393633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146397739) 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, 24399619 + ... + 24399624.

It is an arithmetic number, because the mean of its divisors is an integer number (48799244).

Almost surely, 2^146397729 is an apocalyptic number.

It is an amenable number.

146397729 is a deficient number, since it is larger than the sum of its proper divisors (48799247).

146397729 is an equidigital number, since it uses as much as digits as its factorization.

146397729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48799246.

The product of its digits is 571536, while the sum is 48.

The square root of 146397729 is about 12099.4929232592. The cubic root of 146397729 is about 527.0414592191.

The spelling of 146397729 in words is "one hundred forty-six million, three hundred ninety-seven thousand, seven hundred twenty-nine".