65430619 has 2 divisors, whose sum is σ = 65430620. Its totient is φ = 65430618.

The previous prime is 65430611. The next prime is 65430691. The reversal of 65430619 is 91603456.

Together with next prime (65430691) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65430619 - 2³ = 65430611 is a prime.

It is a super-2 number, since 2×65430619² = 8562331805446322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65430611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32715309 + 32715310.

It is an arithmetic number, because the mean of its divisors is an integer number (32715310).

Almost surely, 2^65430619 is an apocalyptic number.

65430619 is a deficient number, since it is larger than the sum of its proper divisors (1).

65430619 is an equidigital number, since it uses as much as digits as its factorization.

65430619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 65430619 is about 8088.9195199359. The cubic root of 65430619 is about 402.9585201967.

It can be divided in two parts, 65430 and 619, that added together give a square (66049 = 257²).

The spelling of 65430619 in words is "sixty-five million, four hundred thirty thousand, six hundred nineteen".