133623897 has 16 divisors (see below), whose sum is σ = 195767040. Its totient is φ = 80398800.

The previous prime is 133623887. The next prime is 133623901. The reversal of 133623897 is 798326331.

It is a happy number.

It is not a de Polignac number, because 133623897 - 2⁸ = 133623641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133623877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9979 + ... + 19152.

It is an arithmetic number, because the mean of its divisors is an integer number (12235440).

Almost surely, 2^133623897 is an apocalyptic number.

It is an amenable number.

133623897 is a deficient number, since it is larger than the sum of its proper divisors (62143143).

133623897 is a wasteful number, since it uses less digits than its factorization.

133623897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29284.

The product of its digits is 163296, while the sum is 42.

The square root of 133623897 is about 11559.5803124508. The cubic root of 133623897 is about 511.2437884799.

The spelling of 133623897 in words is "one hundred thirty-three million, six hundred twenty-three thousand, eight hundred ninety-seven".