65413993 has 2 divisors, whose sum is σ = 65413994. Its totient is φ = 65413992.

The previous prime is 65413991. The next prime is 65414023. The reversal of 65413993 is 39931456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53114944 + 12299049 = 7288^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 65413993 - 2¹ = 65413991 is a prime.

Together with 65413991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65413991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32706996 + 32706997.

It is an arithmetic number, because the mean of its divisors is an integer number (32706997).

Almost surely, 2^65413993 is an apocalyptic number.

It is an amenable number.

65413993 is a deficient number, since it is larger than the sum of its proper divisors (1).

65413993 is an equidigital number, since it uses as much as digits as its factorization.

65413993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The square root of 65413993 is about 8087.8917524903. The cubic root of 65413993 is about 402.9243865551.

The spelling of 65413993 in words is "sixty-five million, four hundred thirteen thousand, nine hundred ninety-three".