133776421 has 8 divisors (see below), whose sum is σ = 136010880. Its totient is φ = 131549088.

The previous prime is 133776413. The next prime is 133776431. The reversal of 133776421 is 124677331.

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 133776421 - 2³ = 133776413 is a prime.

It is a super-2 number, since 2×133776421² = 35792261631138482, 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 (133776431) 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, 46785 + ... + 49561.

It is an arithmetic number, because the mean of its divisors is an integer number (17001360).

Almost surely, 2^133776421 is an apocalyptic number.

It is an amenable number.

133776421 is a deficient number, since it is larger than the sum of its proper divisors (2234459).

133776421 is an equidigital number, since it uses as much as digits as its factorization.

133776421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563.

The product of its digits is 21168, while the sum is 34.

The square root of 133776421 is about 11566.1757292547. The cubic root of 133776421 is about 511.4382329853.

The spelling of 133776421 in words is "one hundred thirty-three million, seven hundred seventy-six thousand, four hundred twenty-one".