133920587 has 2 divisors, whose sum is σ = 133920588. Its totient is φ = 133920586.

The previous prime is 133920557. The next prime is 133920593. The reversal of 133920587 is 785029331.

It is a strong prime.

It is an emirp because it is prime and its reverse (785029331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133920587 - 2⁸ = 133920331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133920587.

It is not a weakly prime, because it can be changed into another prime (133920517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66960293 + 66960294.

It is an arithmetic number, because the mean of its divisors is an integer number (66960294).

Almost surely, 2^133920587 is an apocalyptic number.

133920587 is a deficient number, since it is larger than the sum of its proper divisors (1).

133920587 is an equidigital number, since it uses as much as digits as its factorization.

133920587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 133920587 is about 11572.4062752740. The cubic root of 133920587 is about 511.6218865108.

The spelling of 133920587 in words is "one hundred thirty-three million, nine hundred twenty thousand, five hundred eighty-seven".