867491663 has 2 divisors, whose sum is σ = 867491664. Its totient is φ = 867491662.

The previous prime is 867491609. The next prime is 867491699. The reversal of 867491663 is 366194768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 867491663 - 2¹⁶ = 867426127 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 (867491063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433745831 + 433745832.

It is an arithmetic number, because the mean of its divisors is an integer number (433745832).

Almost surely, 2^867491663 is an apocalyptic number.

867491663 is a deficient number, since it is larger than the sum of its proper divisors (1).

867491663 is an equidigital number, since it uses as much as digits as its factorization.

867491663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 867491663 is about 29453.2114208281. The cubic root of 867491663 is about 953.7219320492.

The spelling of 867491663 in words is "eight hundred sixty-seven million, four hundred ninety-one thousand, six hundred sixty-three".