133401973 has 2 divisors, whose sum is σ = 133401974. Its totient is φ = 133401972.

The previous prime is 133401949. The next prime is 133401977. The reversal of 133401973 is 379104331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103184964 + 30217009 = 10158^2 + 5497^2 .

It is a cyclic number.

It is not a de Polignac number, because 133401973 - 2⁹ = 133401461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133401977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66700986 + 66700987.

It is an arithmetic number, because the mean of its divisors is an integer number (66700987).

Almost surely, 2^133401973 is an apocalyptic number.

It is an amenable number.

133401973 is a deficient number, since it is larger than the sum of its proper divisors (1).

133401973 is an equidigital number, since it uses as much as digits as its factorization.

133401973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 133401973 is about 11549.9771861247. The cubic root of 133401973 is about 510.9606052634.

The spelling of 133401973 in words is "one hundred thirty-three million, four hundred one thousand, nine hundred seventy-three".