40003247 has 2 divisors, whose sum is σ = 40003248. Its totient is φ = 40003246.

The previous prime is 40003241. The next prime is 40003273. The reversal of 40003247 is 74230004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40003247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40003241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001623 + 20001624.

It is an arithmetic number, because the mean of its divisors is an integer number (20001624).

Almost surely, 2^40003247 is an apocalyptic number.

40003247 is a deficient number, since it is larger than the sum of its proper divisors (1).

40003247 is an equidigital number, since it uses as much as digits as its factorization.

40003247 is an evil number, because the sum of its binary digits is even.

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

The square root of 40003247 is about 6324.8120130167. The cubic root of 40003247 is about 342.0044429048.

The spelling of 40003247 in words is "forty million, three thousand, two hundred forty-seven".