155445673 has 2 divisors, whose sum is σ = 155445674. Its totient is φ = 155445672.

The previous prime is 155445659. The next prime is 155445721. The reversal of 155445673 is 376544551.

155445673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114126489 + 41319184 = 10683^2 + 6428^2 .

It is an emirp because it is prime and its reverse (376544551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155445673 is a prime.

It is not a weakly prime, because it can be changed into another prime (155445613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77722836 + 77722837.

It is an arithmetic number, because the mean of its divisors is an integer number (77722837).

Almost surely, 2^155445673 is an apocalyptic number.

It is an amenable number.

155445673 is a deficient number, since it is larger than the sum of its proper divisors (1).

155445673 is an equidigital number, since it uses as much as digits as its factorization.

155445673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 40.

The square root of 155445673 is about 12467.7854088046. The cubic root of 155445673 is about 537.6828848007.

The spelling of 155445673 in words is "one hundred fifty-five million, four hundred forty-five thousand, six hundred seventy-three".