65445729 has 4 divisors (see below), whose sum is σ = 87260976. Its totient is φ = 43630484.

The previous prime is 65445707. The next prime is 65445763. The reversal of 65445729 is 92754456.

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 65445729 - 2⁸ = 65445473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65445769) 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, 10907619 + ... + 10907624.

It is an arithmetic number, because the mean of its divisors is an integer number (21815244).

Almost surely, 2^65445729 is an apocalyptic number.

It is an amenable number.

65445729 is a deficient number, since it is larger than the sum of its proper divisors (21815247).

65445729 is a wasteful number, since it uses less digits than its factorization.

65445729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21815246.

The product of its digits is 302400, while the sum is 42.

The square root of 65445729 is about 8089.8534597358. The cubic root of 65445729 is about 402.9895364330.

The spelling of 65445729 in words is "sixty-five million, four hundred forty-five thousand, seven hundred twenty-nine".