155078939 has 2 divisors, whose sum is σ = 155078940. Its totient is φ = 155078938.

The previous prime is 155078929. The next prime is 155078971. The reversal of 155078939 is 939870551.

155078939 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 is a cyclic number.

It is not a de Polignac number, because 155078939 - 2⁴ = 155078923 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155078893 and 155078902.

It is not a weakly prime, because it can be changed into another prime (155078929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77539469 + 77539470.

It is an arithmetic number, because the mean of its divisors is an integer number (77539470).

Almost surely, 2^155078939 is an apocalyptic number.

155078939 is a deficient number, since it is larger than the sum of its proper divisors (1).

155078939 is an equidigital number, since it uses as much as digits as its factorization.

155078939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 155078939 is about 12453.0694609803. The cubic root of 155078939 is about 537.2597104420.

The spelling of 155078939 in words is "one hundred fifty-five million, seventy-eight thousand, nine hundred thirty-nine".