447256981 has 2 divisors, whose sum is σ = 447256982. Its totient is φ = 447256980.

The previous prime is 447256969. The next prime is 447257021. The reversal of 447256981 is 189652744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347076900 + 100180081 = 18630^2 + 10009^2 .

It is a cyclic number.

It is not a de Polignac number, because 447256981 - 2¹⁷ = 447125909 is a prime.

It is a super-2 number, since 2×447256981² = 400077614106468722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447296981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223628490 + 223628491.

It is an arithmetic number, because the mean of its divisors is an integer number (223628491).

Almost surely, 2^447256981 is an apocalyptic number.

It is an amenable number.

447256981 is a deficient number, since it is larger than the sum of its proper divisors (1).

447256981 is an equidigital number, since it uses as much as digits as its factorization.

447256981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 447256981 is about 21148.4510307493. The cubic root of 447256981 is about 764.7492199193.

The spelling of 447256981 in words is "four hundred forty-seven million, two hundred fifty-six thousand, nine hundred eighty-one".