7940447 has 2 divisors, whose sum is σ = 7940448. Its totient is φ = 7940446.

The previous prime is 7940437. The next prime is 7940467. The reversal of 7940447 is 7440497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7940447 - 2²² = 3746143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7940417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970223 + 3970224.

It is an arithmetic number, because the mean of its divisors is an integer number (3970224).

Almost surely, 2^7940447 is an apocalyptic number.

7940447 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940447 is an equidigital number, since it uses as much as digits as its factorization.

7940447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 7940447 is about 2817.8798767868. The cubic root of 7940447 is about 199.5024884374.

The spelling of 7940447 in words is "seven million, nine hundred forty thousand, four hundred forty-seven".