155134139 has 2 divisors, whose sum is σ = 155134140. Its totient is φ = 155134138.

The previous prime is 155134099. The next prime is 155134157. The reversal of 155134139 is 931431551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155134139 - 2¹² = 155130043 is a prime.

It is not a weakly prime, because it can be changed into another prime (155134159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77567069 + 77567070.

It is an arithmetic number, because the mean of its divisors is an integer number (77567070).

Almost surely, 2^155134139 is an apocalyptic number.

155134139 is a deficient number, since it is larger than the sum of its proper divisors (1).

155134139 is an equidigital number, since it uses as much as digits as its factorization.

155134139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 155134139 is about 12455.2855848431. The cubic root of 155134139 is about 537.3234483425.

The spelling of 155134139 in words is "one hundred fifty-five million, one hundred thirty-four thousand, one hundred thirty-nine".