133561403 has 2 divisors, whose sum is σ = 133561404. Its totient is φ = 133561402.

The previous prime is 133561369. The next prime is 133561411. The reversal of 133561403 is 304165331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133561403 - 2¹⁴ = 133545019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133561303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66780701 + 66780702.

It is an arithmetic number, because the mean of its divisors is an integer number (66780702).

Almost surely, 2^133561403 is an apocalyptic number.

133561403 is a deficient number, since it is larger than the sum of its proper divisors (1).

133561403 is an equidigital number, since it uses as much as digits as its factorization.

133561403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 133561403 is about 11556.8768705044. The cubic root of 133561403 is about 511.1640755640.

The spelling of 133561403 in words is "one hundred thirty-three million, five hundred sixty-one thousand, four hundred three".