136212493 has 2 divisors, whose sum is σ = 136212494. Its totient is φ = 136212492.

The previous prime is 136212473. The next prime is 136212521. The reversal of 136212493 is 394212631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133125444 + 3087049 = 11538^2 + 1757^2 .

It is a cyclic number.

It is not a de Polignac number, because 136212493 - 2¹³ = 136204301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136212403) 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, 68106246 + 68106247.

It is an arithmetic number, because the mean of its divisors is an integer number (68106247).

Almost surely, 2^136212493 is an apocalyptic number.

It is an amenable number.

136212493 is a deficient number, since it is larger than the sum of its proper divisors (1).

136212493 is an equidigital number, since it uses as much as digits as its factorization.

136212493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 136212493 is about 11671.0107959851. The cubic root of 136212493 is about 514.5240117702.

The spelling of 136212493 in words is "one hundred thirty-six million, two hundred twelve thousand, four hundred ninety-three".