155078093 has 2 divisors, whose sum is σ = 155078094. Its totient is φ = 155078092.

The previous prime is 155078069. The next prime is 155078101. The reversal of 155078093 is 390870551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134629609 + 20448484 = 11603^2 + 4522^2 .

It is an emirp because it is prime and its reverse (390870551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155078093 - 2⁸ = 155077837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155078003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77539046 + 77539047.

It is an arithmetic number, because the mean of its divisors is an integer number (77539047).

Almost surely, 2^155078093 is an apocalyptic number.

It is an amenable number.

155078093 is a deficient number, since it is larger than the sum of its proper divisors (1).

155078093 is an equidigital number, since it uses as much as digits as its factorization.

155078093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 155078093 is about 12453.0354934048. The cubic root of 155078093 is about 537.2587334717.

The spelling of 155078093 in words is "one hundred fifty-five million, seventy-eight thousand, ninety-three".