40234657 has 2 divisors, whose sum is σ = 40234658. Its totient is φ = 40234656.

The previous prime is 40234643. The next prime is 40234661. The reversal of 40234657 is 75643204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38489616 + 1745041 = 6204^2 + 1321^2 .

It is a cyclic number.

It is not a de Polignac number, because 40234657 - 2¹⁹ = 39710369 is a prime.

It is not a weakly prime, because it can be changed into another prime (40231657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20117328 + 20117329.

It is an arithmetic number, because the mean of its divisors is an integer number (20117329).

Almost surely, 2^40234657 is an apocalyptic number.

It is an amenable number.

40234657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40234657 is an equidigital number, since it uses as much as digits as its factorization.

40234657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 40234657 is about 6343.0794571722. The cubic root of 40234657 is about 342.6626488743.

The spelling of 40234657 in words is "forty million, two hundred thirty-four thousand, six hundred fifty-seven".