65421193 has 2 divisors, whose sum is σ = 65421194. Its totient is φ = 65421192.

The previous prime is 65421179. The next prime is 65421197. The reversal of 65421193 is 39112456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47375689 + 18045504 = 6883^2 + 4248^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65421193 is a prime.

It is not a weakly prime, because it can be changed into another prime (65421197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32710596 + 32710597.

It is an arithmetic number, because the mean of its divisors is an integer number (32710597).

Almost surely, 2^65421193 is an apocalyptic number.

It is an amenable number.

65421193 is a deficient number, since it is larger than the sum of its proper divisors (1).

65421193 is an equidigital number, since it uses as much as digits as its factorization.

65421193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 65421193 is about 8088.3368500576. The cubic root of 65421193 is about 402.9391690658.

The spelling of 65421193 in words is "sixty-five million, four hundred twenty-one thousand, one hundred ninety-three".