65698993 has 2 divisors, whose sum is σ = 65698994. Its totient is φ = 65698992.

The previous prime is 65698967. The next prime is 65699003. The reversal of 65698993 is 39989656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 944784 = 8047^2 + 972^2 .

It is a cyclic number.

It is not a de Polignac number, because 65698993 - 2¹⁷ = 65567921 is a prime.

It is not a weakly prime, because it can be changed into another prime (65692993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32849496 + 32849497.

It is an arithmetic number, because the mean of its divisors is an integer number (32849497).

Almost surely, 2^65698993 is an apocalyptic number.

It is an amenable number.

65698993 is a deficient number, since it is larger than the sum of its proper divisors (1).

65698993 is an equidigital number, since it uses as much as digits as its factorization.

65698993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 55.

The square root of 65698993 is about 8105.4915335222. The cubic root of 65698993 is about 403.5087012972.

The spelling of 65698993 in words is "sixty-five million, six hundred ninety-eight thousand, nine hundred ninety-three".