43147933861 has 2 divisors, whose sum is σ = 43147933862. Its totient is φ = 43147933860.

The previous prime is 43147933847. The next prime is 43147933931. The reversal of 43147933861 is 16833974134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29861913636 + 13286020225 = 172806^2 + 115265^2 .

It is a cyclic number.

It is not a de Polignac number, because 43147933861 - 2⁹ = 43147933349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43147933841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21573966930 + 21573966931.

It is an arithmetic number, because the mean of its divisors is an integer number (21573966931).

Almost surely, 2^43147933861 is an apocalyptic number.

It is an amenable number.

43147933861 is a deficient number, since it is larger than the sum of its proper divisors (1).

43147933861 is an equidigital number, since it uses as much as digits as its factorization.

43147933861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 49.

The spelling of 43147933861 in words is "forty-three billion, one hundred forty-seven million, nine hundred thirty-three thousand, eight hundred sixty-one".