133998071 has 2 divisors, whose sum is σ = 133998072. Its totient is φ = 133998070.

The previous prime is 133998049. The next prime is 133998077. The reversal of 133998071 is 170899331.

It is a strong prime.

It is an emirp because it is prime and its reverse (170899331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133998071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133998077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66999035 + 66999036.

It is an arithmetic number, because the mean of its divisors is an integer number (66999036).

Almost surely, 2^133998071 is an apocalyptic number.

133998071 is a deficient number, since it is larger than the sum of its proper divisors (1).

133998071 is an equidigital number, since it uses as much as digits as its factorization.

133998071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 133998071 is about 11575.7535823807. The cubic root of 133998071 is about 511.7205391728.

The spelling of 133998071 in words is "one hundred thirty-three million, nine hundred ninety-eight thousand, seventy-one".