133538401 has 2 divisors, whose sum is σ = 133538402. Its totient is φ = 133538400.

The previous prime is 133538381. The next prime is 133538453. The reversal of 133538401 is 104835331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101909025 + 31629376 = 10095^2 + 5624^2 .

It is a cyclic number.

It is not a de Polignac number, because 133538401 - 2¹³ = 133530209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133538401.

It is not a weakly prime, because it can be changed into another prime (133538201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66769200 + 66769201.

It is an arithmetic number, because the mean of its divisors is an integer number (66769201).

Almost surely, 2^133538401 is an apocalyptic number.

It is an amenable number.

133538401 is a deficient number, since it is larger than the sum of its proper divisors (1).

133538401 is an equidigital number, since it uses as much as digits as its factorization.

133538401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 133538401 is about 11555.8816625994. The cubic root of 133538401 is about 511.1347295832.

The spelling of 133538401 in words is "one hundred thirty-three million, five hundred thirty-eight thousand, four hundred one".