155078971 has 2 divisors, whose sum is σ = 155078972. Its totient is φ = 155078970.

The previous prime is 155078939. The next prime is 155078983. The reversal of 155078971 is 179870551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155078971 - 2⁵ = 155078939 is a prime.

It is not a weakly prime, because it can be changed into another prime (155075971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77539485 + 77539486.

It is an arithmetic number, because the mean of its divisors is an integer number (77539486).

Almost surely, 2^155078971 is an apocalyptic number.

155078971 is a deficient number, since it is larger than the sum of its proper divisors (1).

155078971 is an equidigital number, since it uses as much as digits as its factorization.

155078971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 43.

The square root of 155078971 is about 12453.0707458040. The cubic root of 155078971 is about 537.2597473959.

The spelling of 155078971 in words is "one hundred fifty-five million, seventy-eight thousand, nine hundred seventy-one".