133915853 has 2 divisors, whose sum is σ = 133915854. Its totient is φ = 133915852.

The previous prime is 133915841. The next prime is 133915861. The reversal of 133915853 is 358519331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111239209 + 22676644 = 10547^2 + 4762^2 .

It is a cyclic number.

It is not a de Polignac number, because 133915853 - 2²⁶ = 66806989 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 (133915813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66957926 + 66957927.

It is an arithmetic number, because the mean of its divisors is an integer number (66957927).

Almost surely, 2^133915853 is an apocalyptic number.

It is an amenable number.

133915853 is a deficient number, since it is larger than the sum of its proper divisors (1).

133915853 is an equidigital number, since it uses as much as digits as its factorization.

133915853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 133915853 is about 11572.2017351928. The cubic root of 133915853 is about 511.6158579466.

The spelling of 133915853 in words is "one hundred thirty-three million, nine hundred fifteen thousand, eight hundred fifty-three".