155400727 has 4 divisors (see below), whose sum is σ = 155468376. Its totient is φ = 155333080.

The previous prime is 155400709. The next prime is 155400731. The reversal of 155400727 is 727004551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155400727 - 2¹¹ = 155398679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155400797) 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, 30253 + ... + 35014.

It is an arithmetic number, because the mean of its divisors is an integer number (38867094).

Almost surely, 2^155400727 is an apocalyptic number.

155400727 is a deficient number, since it is larger than the sum of its proper divisors (67649).

155400727 is an equidigital number, since it uses as much as digits as its factorization.

155400727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67648.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 155400727 is about 12465.9827931856. The cubic root of 155400727 is about 537.6310574236.

The spelling of 155400727 in words is "one hundred fifty-five million, four hundred thousand, seven hundred twenty-seven".