133177997 has 4 divisors (see below), whose sum is σ = 133875456. Its totient is φ = 132480540.

The previous prime is 133177943. The next prime is 133178033. The reversal of 133177997 is 799771331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133177997 - 2⁸ = 133177741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133177937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348443 + ... + 348824.

It is an arithmetic number, because the mean of its divisors is an integer number (33468864).

Almost surely, 2^133177997 is an apocalyptic number.

It is an amenable number.

133177997 is a deficient number, since it is larger than the sum of its proper divisors (697459).

133177997 is an equidigital number, since it uses as much as digits as its factorization.

133177997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697458.

The product of its digits is 250047, while the sum is 47.

The square root of 133177997 is about 11540.2771630494. The cubic root of 133177997 is about 510.6744850060.

The spelling of 133177997 in words is "one hundred thirty-three million, one hundred seventy-seven thousand, nine hundred ninety-seven".