43254649 has 2 divisors, whose sum is σ = 43254650. Its totient is φ = 43254648.

The previous prime is 43254637. The next prime is 43254677. The reversal of 43254649 is 94645234.

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., 41512249 + 1742400 = 6443^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 43254649 - 2⁷ = 43254521 is a prime.

It is a super-2 number, since 2×43254649² = 3741929320226402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43254619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21627324 + 21627325.

It is an arithmetic number, because the mean of its divisors is an integer number (21627325).

Almost surely, 2^43254649 is an apocalyptic number.

It is an amenable number.

43254649 is a deficient number, since it is larger than the sum of its proper divisors (1).

43254649 is an equidigital number, since it uses as much as digits as its factorization.

43254649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 37.

The square root of 43254649 is about 6576.8266664099. The cubic root of 43254649 is about 351.0300242442.

The spelling of 43254649 in words is "forty-three million, two hundred fifty-four thousand, six hundred forty-nine".