63891067 has 2 divisors, whose sum is σ = 63891068. Its totient is φ = 63891066.

The previous prime is 63891043. The next prime is 63891073. The reversal of 63891067 is 76019836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63891067 - 2¹¹ = 63889019 is a prime.

It is not a weakly prime, because it can be changed into another prime (63891017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31945533 + 31945534.

It is an arithmetic number, because the mean of its divisors is an integer number (31945534).

Almost surely, 2^63891067 is an apocalyptic number.

63891067 is a deficient number, since it is larger than the sum of its proper divisors (1).

63891067 is an equidigital number, since it uses as much as digits as its factorization.

63891067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 63891067 is about 7993.1887879619. The cubic root of 63891067 is about 399.7729273694.

The spelling of 63891067 in words is "sixty-three million, eight hundred ninety-one thousand, sixty-seven".