155320093 has 2 divisors, whose sum is σ = 155320094. Its totient is φ = 155320092.

The previous prime is 155320073. The next prime is 155320147. The reversal of 155320093 is 390023551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137663289 + 17656804 = 11733^2 + 4202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155320093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155320063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77660046 + 77660047.

It is an arithmetic number, because the mean of its divisors is an integer number (77660047).

Almost surely, 2^155320093 is an apocalyptic number.

It is an amenable number.

155320093 is a deficient number, since it is larger than the sum of its proper divisors (1).

155320093 is an equidigital number, since it uses as much as digits as its factorization.

155320093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 155320093 is about 12462.7482121721. The cubic root of 155320093 is about 537.5380530478.

The spelling of 155320093 in words is "one hundred fifty-five million, three hundred twenty thousand, ninety-three".