155801029 has 2 divisors, whose sum is σ = 155801030. Its totient is φ = 155801028.

The previous prime is 155801027. The next prime is 155801047. The reversal of 155801029 is 920108551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107122500 + 48678529 = 10350^2 + 6977^2 .

It is a cyclic number.

It is not a de Polignac number, because 155801029 - 2¹ = 155801027 is a prime.

Together with 155801027, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155801027) 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, 77900514 + 77900515.

It is an arithmetic number, because the mean of its divisors is an integer number (77900515).

Almost surely, 2^155801029 is an apocalyptic number.

It is an amenable number.

155801029 is a deficient number, since it is larger than the sum of its proper divisors (1).

155801029 is an equidigital number, since it uses as much as digits as its factorization.

155801029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 155801029 is about 12482.0282406346. The cubic root of 155801029 is about 538.0922956316.

The spelling of 155801029 in words is "one hundred fifty-five million, eight hundred one thousand, twenty-nine".