155413729 has 4 divisors (see below), whose sum is σ = 158047920. Its totient is φ = 152779540.

The previous prime is 155413721. The next prime is 155413733. The reversal of 155413729 is 927314551.

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 155413729 - 2³ = 155413721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155413721) 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, 1317007 + ... + 1317124.

It is an arithmetic number, because the mean of its divisors is an integer number (39511980).

Almost surely, 2^155413729 is an apocalyptic number.

It is an amenable number.

155413729 is a deficient number, since it is larger than the sum of its proper divisors (2634191).

155413729 is an equidigital number, since it uses as much as digits as its factorization.

155413729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634190.

The product of its digits is 37800, while the sum is 37.

The square root of 155413729 is about 12466.5042814736. The cubic root of 155413729 is about 537.6460510988.

The spelling of 155413729 in words is "one hundred fifty-five million, four hundred thirteen thousand, seven hundred twenty-nine".