145817087693 has 2 divisors, whose sum is σ = 145817087694. Its totient is φ = 145817087692.

The previous prime is 145817087639. The next prime is 145817087719. The reversal of 145817087693 is 396780718541.

145817087693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (145817087639) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140039111524 + 5777976169 = 374218^2 + 76013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145817087693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145817087893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72908543846 + 72908543847.

It is an arithmetic number, because the mean of its divisors is an integer number (72908543847).

Almost surely, 2^145817087693 is an apocalyptic number.

It is an amenable number.

145817087693 is a deficient number, since it is larger than the sum of its proper divisors (1).

145817087693 is an equidigital number, since it uses as much as digits as its factorization.

145817087693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 145817087693 in words is "one hundred forty-five billion, eight hundred seventeen million, eighty-seven thousand, six hundred ninety-three".