155166797 has 2 divisors, whose sum is σ = 155166798. Its totient is φ = 155166796.

The previous prime is 155166779. The next prime is 155166827. The reversal of 155166797 is 797661551.

Together with previous prime (155166779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79459396 + 75707401 = 8914^2 + 8701^2 .

It is a cyclic number.

It is not a de Polignac number, because 155166797 - 2⁸ = 155166541 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 (155166727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77583398 + 77583399.

It is an arithmetic number, because the mean of its divisors is an integer number (77583399).

Almost surely, 2^155166797 is an apocalyptic number.

It is an amenable number.

155166797 is a deficient number, since it is larger than the sum of its proper divisors (1).

155166797 is an equidigital number, since it uses as much as digits as its factorization.

155166797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 47.

The square root of 155166797 is about 12456.5965255362. The cubic root of 155166797 is about 537.3611505059.

The spelling of 155166797 in words is "one hundred fifty-five million, one hundred sixty-six thousand, seven hundred ninety-seven".