407447561 has 2 divisors, whose sum is σ = 407447562. Its totient is φ = 407447560.

The previous prime is 407447549. The next prime is 407447567. The reversal of 407447561 is 165744704.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405257161 + 2190400 = 20131^2 + 1480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-407447561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (407447567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203723780 + 203723781.

It is an arithmetic number, because the mean of its divisors is an integer number (203723781).

Almost surely, 2^407447561 is an apocalyptic number.

It is an amenable number.

407447561 is a deficient number, since it is larger than the sum of its proper divisors (1).

407447561 is an equidigital number, since it uses as much as digits as its factorization.

407447561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 407447561 is about 20185.3303416119. The cubic root of 407447561 is about 741.3510508174.

The spelling of 407447561 in words is "four hundred seven million, four hundred forty-seven thousand, five hundred sixty-one".