149729 has 2 divisors, whose sum is σ = 149730. Its totient is φ = 149728.
The previous prime is 149717. The next prime is 149731. The reversal of 149729 is 927941.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 144400 + 5329 = 380^2 + 73^2 .
It is a cyclic number.
It is not a de Polignac number, because 149729 - 24 = 149713 is a prime.
Together with 149731, it forms a pair of twin primes.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 149695 and 149704.
It is not a weakly prime, because it can be changed into another prime (149749) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74864 + 74865.
It is an arithmetic number, because the mean of its divisors is an integer number (74865).
2149729 is an apocalyptic number.
It is an amenable number.
149729 is a deficient number, since it is larger than the sum of its proper divisors (1).
149729 is an equidigital number, since it uses as much as digits as its factorization.
149729 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 4536, while the sum is 32.
The square root of 149729 is about 386.9483169624. The cubic root of 149729 is about 53.1009113397.
It can be divided in two parts, 149 and 729, that added together give a palindrome (878).
The spelling of 149729 in words is "one hundred forty-nine thousand, seven hundred twenty-nine".
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