155117069 has 2 divisors, whose sum is σ = 155117070. Its totient is φ = 155117068.

The previous prime is 155117059. The next prime is 155117071. The reversal of 155117069 is 960711551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99241444 + 55875625 = 9962^2 + 7475^2 .

It is a cyclic number.

It is not a de Polignac number, because 155117069 - 2²⁴ = 138339853 is a prime.

It is a super-2 number, since 2×155117069² = 48122610190301522, which contains 22 as substring.

Together with 155117071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155117059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77558534 + 77558535.

It is an arithmetic number, because the mean of its divisors is an integer number (77558535).

Almost surely, 2^155117069 is an apocalyptic number.

It is an amenable number.

155117069 is a deficient number, since it is larger than the sum of its proper divisors (1).

155117069 is an equidigital number, since it uses as much as digits as its factorization.

155117069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 35.

The square root of 155117069 is about 12454.6003147431. The cubic root of 155117069 is about 537.3037397046.

The spelling of 155117069 in words is "one hundred fifty-five million, one hundred seventeen thousand, sixty-nine".