133478801 has 2 divisors, whose sum is σ = 133478802. Its totient is φ = 133478800.

The previous prime is 133478791. The next prime is 133478803. The reversal of 133478801 is 108874331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90916225 + 42562576 = 9535^2 + 6524^2 .

It is a cyclic number.

It is not a de Polignac number, because 133478801 - 2²² = 129284497 is a prime.

Together with 133478803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133478803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66739400 + 66739401.

It is an arithmetic number, because the mean of its divisors is an integer number (66739401).

Almost surely, 2^133478801 is an apocalyptic number.

133478801 is the 6176-th centered heptagonal number.

It is an amenable number.

133478801 is a deficient number, since it is larger than the sum of its proper divisors (1).

133478801 is an equidigital number, since it uses as much as digits as its factorization.

133478801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 133478801 is about 11553.3026014209. The cubic root of 133478801 is about 511.0586761461.

The spelling of 133478801 in words is "one hundred thirty-three million, four hundred seventy-eight thousand, eight hundred one".