151489729 has 4 divisors (see below), whose sum is σ = 155584084. Its totient is φ = 147395376.

The previous prime is 151489697. The next prime is 151489733. The reversal of 151489729 is 927984151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143520400 + 7969329 = 11980^2 + 2823^2 .

It is a cyclic number.

It is not a de Polignac number, because 151489729 - 2⁵ = 151489697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151489739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047122 + ... + 2047195.

It is an arithmetic number, because the mean of its divisors is an integer number (38896021).

Almost surely, 2^151489729 is an apocalyptic number.

It is an amenable number.

151489729 is a deficient number, since it is larger than the sum of its proper divisors (4094355).

151489729 is an equidigital number, since it uses as much as digits as its factorization.

151489729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094354.

The product of its digits is 181440, while the sum is 46.

The square root of 151489729 is about 12308.1163871650. The cubic root of 151489729 is about 533.0824637418.

The spelling of 151489729 in words is "one hundred fifty-one million, four hundred eighty-nine thousand, seven hundred twenty-nine".