133649851 has 2 divisors, whose sum is σ = 133649852. Its totient is φ = 133649850.

The previous prime is 133649839. The next prime is 133649881. The reversal of 133649851 is 158946331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133649851 - 2¹³ = 133641659 is a prime.

It is not a weakly prime, because it can be changed into another prime (133649821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66824925 + 66824926.

It is an arithmetic number, because the mean of its divisors is an integer number (66824926).

Almost surely, 2^133649851 is an apocalyptic number.

133649851 is a deficient number, since it is larger than the sum of its proper divisors (1).

133649851 is an equidigital number, since it uses as much as digits as its factorization.

133649851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 133649851 is about 11560.7028765556. The cubic root of 133649851 is about 511.2768862581.

The spelling of 133649851 in words is "one hundred thirty-three million, six hundred forty-nine thousand, eight hundred fifty-one".