64869811 has 2 divisors, whose sum is σ = 64869812. Its totient is φ = 64869810.

The previous prime is 64869793. The next prime is 64869853. The reversal of 64869811 is 11896846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64869811 - 2¹⁵ = 64837043 is a prime.

It is not a weakly prime, because it can be changed into another prime (64869881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32434905 + 32434906.

It is an arithmetic number, because the mean of its divisors is an integer number (32434906).

Almost surely, 2^64869811 is an apocalyptic number.

64869811 is a deficient number, since it is larger than the sum of its proper divisors (1).

64869811 is an equidigital number, since it uses as much as digits as its factorization.

64869811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 64869811 is about 8054.1797223553. The cubic root of 64869811 is about 401.8039583553.

The spelling of 64869811 in words is "sixty-four million, eight hundred sixty-nine thousand, eight hundred eleven".