133927447921 has 2 divisors, whose sum is σ = 133927447922. Its totient is φ = 133927447920.

The previous prime is 133927447903. The next prime is 133927447933. The reversal of 133927447921 is 129744729331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108135087921 + 25792360000 = 328839^2 + 160600^2 .

It is a cyclic number.

It is not a de Polignac number, because 133927447921 - 2⁷ = 133927447793 is a prime.

It is a super-2 number, since 2×133927447921² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133927447021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66963723960 + 66963723961.

It is an arithmetic number, because the mean of its divisors is an integer number (66963723961).

Almost surely, 2^133927447921 is an apocalyptic number.

It is an amenable number.

133927447921 is a deficient number, since it is larger than the sum of its proper divisors (1).

133927447921 is an equidigital number, since it uses as much as digits as its factorization.

133927447921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 52.

The spelling of 133927447921 in words is "one hundred thirty-three billion, nine hundred twenty-seven million, four hundred forty-seven thousand, nine hundred twenty-one".