65953619 has 2 divisors, whose sum is σ = 65953620. Its totient is φ = 65953618.

The previous prime is 65953609. The next prime is 65953631. The reversal of 65953619 is 91635956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65953619 - 2²⁴ = 49176403 is a prime.

It is a super-2 number, since 2×65953619² = 8699759718394322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65953619.

It is not a weakly prime, because it can be changed into another prime (65953609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32976809 + 32976810.

It is an arithmetic number, because the mean of its divisors is an integer number (32976810).

Almost surely, 2^65953619 is an apocalyptic number.

65953619 is a deficient number, since it is larger than the sum of its proper divisors (1).

65953619 is an equidigital number, since it uses as much as digits as its factorization.

65953619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 44.

The square root of 65953619 is about 8121.1833497342. The cubic root of 65953619 is about 404.0293148515.

The spelling of 65953619 in words is "sixty-five million, nine hundred fifty-three thousand, six hundred nineteen".