133640651 has 2 divisors, whose sum is σ = 133640652. Its totient is φ = 133640650.

The previous prime is 133640609. The next prime is 133640657. The reversal of 133640651 is 156046331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133640651 - 2¹⁸ = 133378507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133640657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66820325 + 66820326.

It is an arithmetic number, because the mean of its divisors is an integer number (66820326).

Almost surely, 2^133640651 is an apocalyptic number.

133640651 is a deficient number, since it is larger than the sum of its proper divisors (1).

133640651 is an equidigital number, since it uses as much as digits as its factorization.

133640651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 133640651 is about 11560.3049700257. The cubic root of 133640651 is about 511.2651544698.

Adding to 133640651 its reverse (156046331), we get a palindrome (289686982).

The spelling of 133640651 in words is "one hundred thirty-three million, six hundred forty thousand, six hundred fifty-one".