43481693 has 2 divisors, whose sum is σ = 43481694. Its totient is φ = 43481692.

The previous prime is 43481687. The next prime is 43481731. The reversal of 43481693 is 39618434.

It is an a-pointer prime, because the next prime (43481731) can be obtained adding 43481693 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 683929 = 6542^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 43481693 - 2⁶ = 43481629 is a prime.

It is a super-2 number, since 2×43481693² = 3781315252292498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43481663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21740846 + 21740847.

It is an arithmetic number, because the mean of its divisors is an integer number (21740847).

Almost surely, 2^43481693 is an apocalyptic number.

It is an amenable number.

43481693 is a deficient number, since it is larger than the sum of its proper divisors (1).

43481693 is an equidigital number, since it uses as much as digits as its factorization.

43481693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 43481693 is about 6594.0649829980. The cubic root of 43481693 is about 351.6431392160.

The spelling of 43481693 in words is "forty-three million, four hundred eighty-one thousand, six hundred ninety-three".