151808729 has 2 divisors, whose sum is σ = 151808730. Its totient is φ = 151808728.

The previous prime is 151808719. The next prime is 151808749. The reversal of 151808729 is 927808151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148840000 + 2968729 = 12200^2 + 1723^2 .

It is a cyclic number.

It is not a de Polignac number, because 151808729 - 2⁸ = 151808473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (151808719) 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 as a sum of consecutive naturals, namely, 75904364 + 75904365.

It is an arithmetic number, because the mean of its divisors is an integer number (75904365).

Almost surely, 2^151808729 is an apocalyptic number.

It is an amenable number.

151808729 is a deficient number, since it is larger than the sum of its proper divisors (1).

151808729 is an equidigital number, since it uses as much as digits as its factorization.

151808729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 151808729 is about 12321.0685007429. The cubic root of 151808729 is about 533.4563814612.

The spelling of 151808729 in words is "one hundred fifty-one million, eight hundred eight thousand, seven hundred twenty-nine".