65421197 has 2 divisors, whose sum is σ = 65421198. Its totient is φ = 65421196.

The previous prime is 65421193. The next prime is 65421211. The reversal of 65421197 is 79112456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46594276 + 18826921 = 6826^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 65421197 - 2² = 65421193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65421193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32710598 + 32710599.

It is an arithmetic number, because the mean of its divisors is an integer number (32710599).

Almost surely, 2^65421197 is an apocalyptic number.

It is an amenable number.

65421197 is a deficient number, since it is larger than the sum of its proper divisors (1).

65421197 is an equidigital number, since it uses as much as digits as its factorization.

65421197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 65421197 is about 8088.3370973272. The cubic root of 65421197 is about 402.9391772780.

The spelling of 65421197 in words is "sixty-five million, four hundred twenty-one thousand, one hundred ninety-seven".