64486693 has 2 divisors, whose sum is σ = 64486694. Its totient is φ = 64486692.

The previous prime is 64486657. The next prime is 64486717. The reversal of 64486693 is 39668446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60730849 + 3755844 = 7793^2 + 1938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64486693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64486613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32243346 + 32243347.

It is an arithmetic number, because the mean of its divisors is an integer number (32243347).

Almost surely, 2^64486693 is an apocalyptic number.

It is an amenable number.

64486693 is a deficient number, since it is larger than the sum of its proper divisors (1).

64486693 is an equidigital number, since it uses as much as digits as its factorization.

64486693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 46.

The square root of 64486693 is about 8030.3607017369. The cubic root of 64486693 is about 401.0113843489.

The spelling of 64486693 in words is "sixty-four million, four hundred eighty-six thousand, six hundred ninety-three".