133614421 has 2 divisors, whose sum is σ = 133614422. Its totient is φ = 133614420.

The previous prime is 133614419. The next prime is 133614427. The reversal of 133614421 is 124416331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100781521 + 32832900 = 10039^2 + 5730^2 .

It is a cyclic number.

It is not a de Polignac number, because 133614421 - 2¹ = 133614419 is a prime.

Together with 133614419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133614427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66807210 + 66807211.

It is an arithmetic number, because the mean of its divisors is an integer number (66807211).

Almost surely, 2^133614421 is an apocalyptic number.

It is an amenable number.

133614421 is a deficient number, since it is larger than the sum of its proper divisors (1).

133614421 is an equidigital number, since it uses as much as digits as its factorization.

133614421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 133614421 is about 11559.1704287116. The cubic root of 133614421 is about 511.2317031649.

The spelling of 133614421 in words is "one hundred thirty-three million, six hundred fourteen thousand, four hundred twenty-one".