65042813 has 4 divisors (see below), whose sum is σ = 70955808. Its totient is φ = 59129820.

The previous prime is 65042759. The next prime is 65042837. The reversal of 65042813 is 31824056.

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 65042813 - 2²⁰ = 63994237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65042213) 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, 2956481 + ... + 2956502.

It is an arithmetic number, because the mean of its divisors is an integer number (17738952).

Almost surely, 2^65042813 is an apocalyptic number.

It is an amenable number.

65042813 is a deficient number, since it is larger than the sum of its proper divisors (5912995).

65042813 is a wasteful number, since it uses less digits than its factorization.

65042813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912994.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 65042813 is about 8064.9124607772. The cubic root of 65042813 is about 402.1608330650.

Adding to 65042813 its reverse (31824056), we get a palindrome (96866869).

The spelling of 65042813 in words is "sixty-five million, forty-two thousand, eight hundred thirteen".