65891401 has 2 divisors, whose sum is σ = 65891402. Its totient is φ = 65891400.

The previous prime is 65891369. The next prime is 65891431. The reversal of 65891401 is 10419856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65367225 + 524176 = 8085^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 65891401 - 2⁵ = 65891369 is a prime.

It is not a weakly prime, because it can be changed into another prime (65891431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32945700 + 32945701.

It is an arithmetic number, because the mean of its divisors is an integer number (32945701).

Almost surely, 2^65891401 is an apocalyptic number.

It is an amenable number.

65891401 is a deficient number, since it is larger than the sum of its proper divisors (1).

65891401 is an equidigital number, since it uses as much as digits as its factorization.

65891401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 65891401 is about 8117.3518465076. The cubic root of 65891401 is about 403.9022265273.

The spelling of 65891401 in words is "sixty-five million, eight hundred ninety-one thousand, four hundred one".