43854893813 has 2 divisors, whose sum is σ = 43854893814. Its totient is φ = 43854893812.

The previous prime is 43854893807. The next prime is 43854893839. The reversal of 43854893813 is 31839845834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24742660804 + 19112233009 = 157298^2 + 138247^2 .

It is a cyclic number.

It is not a de Polignac number, because 43854893813 - 2⁶ = 43854893749 is a prime.

It is a super-2 number, since 2×43854893813² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43854893893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21927446906 + 21927446907.

It is an arithmetic number, because the mean of its divisors is an integer number (21927446907).

Almost surely, 2^43854893813 is an apocalyptic number.

It is an amenable number.

43854893813 is a deficient number, since it is larger than the sum of its proper divisors (1).

43854893813 is an equidigital number, since it uses as much as digits as its factorization.

43854893813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 56.

The spelling of 43854893813 in words is "forty-three billion, eight hundred fifty-four million, eight hundred ninety-three thousand, eight hundred thirteen".