133179919 has 6 divisors (see below), whose sum is σ = 137931560. Its totient is φ = 128586696.

The previous prime is 133179899. The next prime is 133179923. The reversal of 133179919 is 919971331.

It is a happy number.

It is not a de Polignac number, because 133179919 - 2⁷ = 133179791 is a prime.

It is a super-2 number, since 2×133179919² = 35473781649693122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133179979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78339 + ... + 80020.

Almost surely, 2^133179919 is an apocalyptic number.

133179919 is a deficient number, since it is larger than the sum of its proper divisors (4751641).

133179919 is an equidigital number, since it uses as much as digits as its factorization.

133179919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158417 (or 158388 counting only the distinct ones).

The product of its digits is 45927, while the sum is 43.

The square root of 133179919 is about 11540.3604363122. The cubic root of 133179919 is about 510.6769416472.

The spelling of 133179919 in words is "one hundred thirty-three million, one hundred seventy-nine thousand, nine hundred nineteen".