40870447 has 2 divisors, whose sum is σ = 40870448. Its totient is φ = 40870446.

The previous prime is 40870441. The next prime is 40870507. The reversal of 40870447 is 74407804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40870447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40870441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20435223 + 20435224.

It is an arithmetic number, because the mean of its divisors is an integer number (20435224).

Almost surely, 2^40870447 is an apocalyptic number.

40870447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40870447 is an equidigital number, since it uses as much as digits as its factorization.

40870447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 40870447 is about 6392.9998435789. Note that the first 3 decimals coincide. The cubic root of 40870447 is about 344.4581482311.

The spelling of 40870447 in words is "forty million, eight hundred seventy thousand, four hundred forty-seven".