134847401621 has 2 divisors, whose sum is σ = 134847401622. Its totient is φ = 134847401620.

The previous prime is 134847401573. The next prime is 134847401651. The reversal of 134847401621 is 126104748431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98476716100 + 36370685521 = 313810^2 + 190711^2 .

It is a cyclic number.

It is not a de Polignac number, because 134847401621 - 2¹⁸ = 134847139477 is a prime.

It is a super-3 number, since 3×134847401621³ (a number of 34 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134847401651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67423700810 + 67423700811.

It is an arithmetic number, because the mean of its divisors is an integer number (67423700811).

Almost surely, 2^134847401621 is an apocalyptic number.

It is an amenable number.

134847401621 is a deficient number, since it is larger than the sum of its proper divisors (1).

134847401621 is an equidigital number, since it uses as much as digits as its factorization.

134847401621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 134847401621 in words is "one hundred thirty-four billion, eight hundred forty-seven million, four hundred one thousand, six hundred twenty-one".