63069991 has 2 divisors, whose sum is σ = 63069992. Its totient is φ = 63069990.

The previous prime is 63069971. The next prime is 63070001. The reversal of 63069991 is 19996036.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63069991 - 2⁵ = 63069959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63069901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31534995 + 31534996.

It is an arithmetic number, because the mean of its divisors is an integer number (31534996).

Almost surely, 2^63069991 is an apocalyptic number.

63069991 is a deficient number, since it is larger than the sum of its proper divisors (1).

63069991 is an equidigital number, since it uses as much as digits as its factorization.

63069991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 63069991 is about 7941.6617278753. The cubic root of 63069991 is about 398.0530197962.

The spelling of 63069991 in words is "sixty-three million, sixty-nine thousand, nine hundred ninety-one".