43487149 has 2 divisors, whose sum is σ = 43487150. Its totient is φ = 43487148.

The previous prime is 43487063. The next prime is 43487161. The reversal of 43487149 is 94178434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 59049 = 6590^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 43487149 - 2⁹ = 43486637 is a prime.

It is a super-2 number, since 2×43487149² = 3782264256296402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43485149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21743574 + 21743575.

It is an arithmetic number, because the mean of its divisors is an integer number (21743575).

Almost surely, 2^43487149 is an apocalyptic number.

It is an amenable number.

43487149 is a deficient number, since it is larger than the sum of its proper divisors (1).

43487149 is an equidigital number, since it uses as much as digits as its factorization.

43487149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 43487149 is about 6594.4786753768. The cubic root of 43487149 is about 351.6578464379.

The spelling of 43487149 in words is "forty-three million, four hundred eighty-seven thousand, one hundred forty-nine".