155593349 has 2 divisors, whose sum is σ = 155593350. Its totient is φ = 155593348.

The previous prime is 155593343. The next prime is 155593351. The reversal of 155593349 is 943395551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103897249 + 51696100 = 10193^2 + 7190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155593349 is a prime.

Together with 155593351, 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 (155593343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77796674 + 77796675.

It is an arithmetic number, because the mean of its divisors is an integer number (77796675).

Almost surely, 2^155593349 is an apocalyptic number.

It is an amenable number.

155593349 is a deficient number, since it is larger than the sum of its proper divisors (1).

155593349 is an equidigital number, since it uses as much as digits as its factorization.

155593349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 364500, while the sum is 44.

The square root of 155593349 is about 12473.7063056655. The cubic root of 155593349 is about 537.8531001665.

The spelling of 155593349 in words is "one hundred fifty-five million, five hundred ninety-three thousand, three hundred forty-nine".