65913729 has 32 divisors (see below), whose sum is σ = 103403520. Its totient is φ = 36571392.

The previous prime is 65913713. The next prime is 65913737. The reversal of 65913729 is 92731956.

It is not a de Polignac number, because 65913729 - 2⁴ = 65913713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65913739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110857 + ... + 111449.

It is an arithmetic number, because the mean of its divisors is an integer number (3231360).

Almost surely, 2^65913729 is an apocalyptic number.

It is an amenable number.

65913729 is a deficient number, since it is larger than the sum of its proper divisors (37489791).

65913729 is a wasteful number, since it uses less digits than its factorization.

65913729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749.

The product of its digits is 102060, while the sum is 42.

The square root of 65913729 is about 8118.7270553948. The cubic root of 65913729 is about 403.9478435593.

The spelling of 65913729 in words is "sixty-five million, nine hundred thirteen thousand, seven hundred twenty-nine".