133979843 has 2 divisors, whose sum is σ = 133979844. Its totient is φ = 133979842.

The previous prime is 133979831. The next prime is 133979891. The reversal of 133979843 is 348979331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133979843 - 2¹² = 133975747 is a prime.

It is not a weakly prime, because it can be changed into another prime (133979143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66989921 + 66989922.

It is an arithmetic number, because the mean of its divisors is an integer number (66989922).

Almost surely, 2^133979843 is an apocalyptic number.

133979843 is a deficient number, since it is larger than the sum of its proper divisors (1).

133979843 is an equidigital number, since it uses as much as digits as its factorization.

133979843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 133979843 is about 11574.9662202531. The cubic root of 133979843 is about 511.6973346971.

The spelling of 133979843 in words is "one hundred thirty-three million, nine hundred seventy-nine thousand, eight hundred forty-three".