155069399 has 2 divisors, whose sum is σ = 155069400. Its totient is φ = 155069398.

The previous prime is 155069363. The next prime is 155069401. The reversal of 155069399 is 993960551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155069399 - 2⁸ = 155069143 is a prime.

It is a Sophie Germain prime.

Together with 155069401, 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 (155069329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77534699 + 77534700.

It is an arithmetic number, because the mean of its divisors is an integer number (77534700).

Almost surely, 2^155069399 is an apocalyptic number.

155069399 is a deficient number, since it is larger than the sum of its proper divisors (1).

155069399 is an equidigital number, since it uses as much as digits as its factorization.

155069399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 328050, while the sum is 47.

The square root of 155069399 is about 12452.6864169945. The cubic root of 155069399 is about 537.2486933372.

The spelling of 155069399 in words is "one hundred fifty-five million, sixty-nine thousand, three hundred ninety-nine".