65491853 has 4 divisors (see below), whose sum is σ = 74847840. Its totient is φ = 56135868.

The previous prime is 65491849. The next prime is 65491859. The reversal of 65491853 is 35819456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65491853 - 2² = 65491849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65491853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65491859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4677983 + ... + 4677996.

It is an arithmetic number, because the mean of its divisors is an integer number (18711960).

Almost surely, 2^65491853 is an apocalyptic number.

It is an amenable number.

65491853 is a deficient number, since it is larger than the sum of its proper divisors (9355987).

65491853 is an equidigital number, since it uses as much as digits as its factorization.

65491853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9355986.

The product of its digits is 129600, while the sum is 41.

The square root of 65491853 is about 8092.7036891264. The cubic root of 65491853 is about 403.0841854638.

The spelling of 65491853 in words is "sixty-five million, four hundred ninety-one thousand, eight hundred fifty-three".