155385487 has 2 divisors, whose sum is σ = 155385488. Its totient is φ = 155385486.

The previous prime is 155385481. The next prime is 155385497. The reversal of 155385487 is 784583551.

It is a weak prime.

It is an emirp because it is prime and its reverse (784583551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155385487 - 2²³ = 146996879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155385481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77692743 + 77692744.

It is an arithmetic number, because the mean of its divisors is an integer number (77692744).

Almost surely, 2^155385487 is an apocalyptic number.

155385487 is a deficient number, since it is larger than the sum of its proper divisors (1).

155385487 is an equidigital number, since it uses as much as digits as its factorization.

155385487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672000, while the sum is 46.

The square root of 155385487 is about 12465.3715147203. The cubic root of 155385487 is about 537.6134818620.

It can be divided in two parts, 15538 and 5487, that added together give a square (21025 = 145²).

The spelling of 155385487 in words is "one hundred fifty-five million, three hundred eighty-five thousand, four hundred eighty-seven".