134198621 has 2 divisors, whose sum is σ = 134198622. Its totient is φ = 134198620.

The previous prime is 134198579. The next prime is 134198639. The reversal of 134198621 is 126891431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96314596 + 37884025 = 9814^2 + 6155^2 .

It is an emirp because it is prime and its reverse (126891431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134198621 - 2¹⁸ = 133936477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134198641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67099310 + 67099311.

It is an arithmetic number, because the mean of its divisors is an integer number (67099311).

Almost surely, 2^134198621 is an apocalyptic number.

It is an amenable number.

134198621 is a deficient number, since it is larger than the sum of its proper divisors (1).

134198621 is an equidigital number, since it uses as much as digits as its factorization.

134198621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 134198621 is about 11584.4128465797. The cubic root of 134198621 is about 511.9757030401.

The spelling of 134198621 in words is "one hundred thirty-four million, one hundred ninety-eight thousand, six hundred twenty-one".