133699649 has 2 divisors, whose sum is σ = 133699650. Its totient is φ = 133699648.

The previous prime is 133699619. The next prime is 133699651. The reversal of 133699649 is 946996331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 66049 = 11560^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 133699649 - 2²⁴ = 116922433 is a prime.

It is a super-2 number, since 2×133699649² = 35751192285446402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 133699651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133699597 and 133699606.

It is not a weakly prime, because it can be changed into another prime (133699619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66849824 + 66849825.

It is an arithmetic number, because the mean of its divisors is an integer number (66849825).

Almost surely, 2^133699649 is an apocalyptic number.

It is an amenable number.

133699649 is a deficient number, since it is larger than the sum of its proper divisors (1).

133699649 is an equidigital number, since it uses as much as digits as its factorization.

133699649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 50.

The square root of 133699649 is about 11562.8564377493. The cubic root of 133699649 is about 511.3403790457.

The spelling of 133699649 in words is "one hundred thirty-three million, six hundred ninety-nine thousand, six hundred forty-nine".