40030247 has 2 divisors, whose sum is σ = 40030248. Its totient is φ = 40030246.

The previous prime is 40030241. The next prime is 40030271. The reversal of 40030247 is 74203004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40030247 - 2⁴ = 40030231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40030241) 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, 20015123 + 20015124.

It is an arithmetic number, because the mean of its divisors is an integer number (20015124).

Almost surely, 2^40030247 is an apocalyptic number.

40030247 is a deficient number, since it is larger than the sum of its proper divisors (1).

40030247 is an equidigital number, since it uses as much as digits as its factorization.

40030247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 40030247 is about 6326.9461037692. The cubic root of 40030247 is about 342.0813703538.

The spelling of 40030247 in words is "forty million, thirty thousand, two hundred forty-seven".