136851893 has 2 divisors, whose sum is σ = 136851894. Its totient is φ = 136851892.

The previous prime is 136851821. The next prime is 136851961. The reversal of 136851893 is 398158631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129572689 + 7279204 = 11383^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 136851893 - 2¹² = 136847797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136851193) 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, 68425946 + 68425947.

It is an arithmetic number, because the mean of its divisors is an integer number (68425947).

Almost surely, 2^136851893 is an apocalyptic number.

It is an amenable number.

136851893 is a deficient number, since it is larger than the sum of its proper divisors (1).

136851893 is an equidigital number, since it uses as much as digits as its factorization.

136851893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 136851893 is about 11698.3713823763. The cubic root of 136851893 is about 515.3278372607.

The spelling of 136851893 in words is "one hundred thirty-six million, eight hundred fifty-one thousand, eight hundred ninety-three".