867961447 has 2 divisors, whose sum is σ = 867961448. Its totient is φ = 867961446.

The previous prime is 867961421. The next prime is 867961463. The reversal of 867961447 is 744169768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 867961447 - 2⁷ = 867961319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 867961394 and 867961403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867961417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433980723 + 433980724.

It is an arithmetic number, because the mean of its divisors is an integer number (433980724).

Almost surely, 2^867961447 is an apocalyptic number.

867961447 is a deficient number, since it is larger than the sum of its proper divisors (1).

867961447 is an equidigital number, since it uses as much as digits as its factorization.

867961447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 867961447 is about 29461.1854310040. The cubic root of 867961447 is about 953.8940614460.

The spelling of 867961447 in words is "eight hundred sixty-seven million, nine hundred sixty-one thousand, four hundred forty-seven".