155492729 has 12 divisors (see below), whose sum is σ = 183582864. Its totient is φ = 131287464.

The previous prime is 155492699. The next prime is 155492731. The reversal of 155492729 is 927294551.

It is a de Polignac number, because none of the positive numbers 2^k-155492729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155492729.

It is not an unprimeable number, because it can be changed into a prime (155492629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20399 + ... + 26964.

It is an arithmetic number, because the mean of its divisors is an integer number (15298572).

Almost surely, 2^155492729 is an apocalyptic number.

It is an amenable number.

155492729 is a deficient number, since it is larger than the sum of its proper divisors (28090135).

155492729 is an equidigital number, since it uses as much as digits as its factorization.

155492729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47444 (or 47437 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 155492729 is about 12469.6723693929. The cubic root of 155492729 is about 537.7371345218.

The spelling of 155492729 in words is "one hundred fifty-five million, four hundred ninety-two thousand, seven hundred twenty-nine".