133972819 has 8 divisors (see below), whose sum is σ = 144836240. Its totient is φ = 123490656.

The previous prime is 133972753. The next prime is 133972823. The reversal of 133972819 is 918279331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133972819 - 2⁷ = 133972691 is a prime.

It is a super-2 number, since 2×133972819² = 35897432461613522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133972829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94584 + ... + 95989.

It is an arithmetic number, because the mean of its divisors is an integer number (18104530).

Almost surely, 2^133972819 is an apocalyptic number.

133972819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

133972819 is a deficient number, since it is larger than the sum of its proper divisors (10863421).

133972819 is a wasteful number, since it uses less digits than its factorization.

133972819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190629.

The product of its digits is 81648, while the sum is 43.

The square root of 133972819 is about 11574.6628028638. The cubic root of 133972819 is about 511.6883924940.

The spelling of 133972819 in words is "one hundred thirty-three million, nine hundred seventy-two thousand, eight hundred nineteen".