149278507193 has 2 divisors, whose sum is σ = 149278507194. Its totient is φ = 149278507192.

The previous prime is 149278507181. The next prime is 149278507297. The reversal of 149278507193 is 391705872941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91005995584 + 58272511609 = 301672^2 + 241397^2 .

It is an emirp because it is prime and its reverse (391705872941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149278507193 - 2⁶ = 149278507129 is a prime.

It is not a weakly prime, because it can be changed into another prime (149278507793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74639253596 + 74639253597.

It is an arithmetic number, because the mean of its divisors is an integer number (74639253597).

Almost surely, 2^149278507193 is an apocalyptic number.

It is an amenable number.

149278507193 is a deficient number, since it is larger than the sum of its proper divisors (1).

149278507193 is an equidigital number, since it uses as much as digits as its factorization.

149278507193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 149278507193 in words is "one hundred forty-nine billion, two hundred seventy-eight million, five hundred seven thousand, one hundred ninety-three".