43949419 has 2 divisors, whose sum is σ = 43949420. Its totient is φ = 43949418.

The previous prime is 43949407. The next prime is 43949449. The reversal of 43949419 is 91494934.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43949419 - 2⁹ = 43948907 is a prime.

It is a super-2 number, since 2×43949419² = 3863102860875122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43949449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21974709 + 21974710.

It is an arithmetic number, because the mean of its divisors is an integer number (21974710).

Almost surely, 2^43949419 is an apocalyptic number.

43949419 is a deficient number, since it is larger than the sum of its proper divisors (1).

43949419 is an equidigital number, since it uses as much as digits as its factorization.

43949419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 43949419 is about 6629.4357980148. The cubic root of 43949419 is about 352.8995024580.

The spelling of 43949419 in words is "forty-three million, nine hundred forty-nine thousand, four hundred nineteen".