40534649 has 2 divisors, whose sum is σ = 40534650. Its totient is φ = 40534648.

The previous prime is 40534643. The next prime is 40534661. The reversal of 40534649 is 94643504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26419600 + 14115049 = 5140^2 + 3757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40534649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40534643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20267324 + 20267325.

It is an arithmetic number, because the mean of its divisors is an integer number (20267325).

Almost surely, 2^40534649 is an apocalyptic number.

It is an amenable number.

40534649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40534649 is an equidigital number, since it uses as much as digits as its factorization.

40534649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 40534649 is about 6366.6827312188. The cubic root of 40534649 is about 343.5121786873.

The spelling of 40534649 in words is "forty million, five hundred thirty-four thousand, six hundred forty-nine".