155079191 has 2 divisors, whose sum is σ = 155079192. Its totient is φ = 155079190.

The previous prime is 155079187. The next prime is 155079251. The reversal of 155079191 is 191970551.

155079191 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 an emirp because it is prime and its reverse (191970551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155079191 - 2² = 155079187 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155079101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77539595 + 77539596.

It is an arithmetic number, because the mean of its divisors is an integer number (77539596).

Almost surely, 2^155079191 is an apocalyptic number.

155079191 is a deficient number, since it is larger than the sum of its proper divisors (1).

155079191 is an equidigital number, since it uses as much as digits as its factorization.

155079191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14175, while the sum is 38.

The square root of 155079191 is about 12453.0795789636. The cubic root of 155079191 is about 537.2600014537.

The spelling of 155079191 in words is "one hundred fifty-five million, seventy-nine thousand, one hundred ninety-one".