65069381 has 4 divisors (see below), whose sum is σ = 70074732. Its totient is φ = 60064032.

The previous prime is 65069327. The next prime is 65069497. The reversal of 65069381 is 18396056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10176100 + 54893281 = 3190^2 + 7409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65069381 is a prime.

It is a super-2 number, since 2×65069381² = 8468048687446322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65069311) 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, 2502656 + ... + 2502681.

It is an arithmetic number, because the mean of its divisors is an integer number (17518683).

Almost surely, 2^65069381 is an apocalyptic number.

It is an amenable number.

65069381 is a deficient number, since it is larger than the sum of its proper divisors (5005351).

65069381 is a wasteful number, since it uses less digits than its factorization.

65069381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005350.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 65069381 is about 8066.5594276618. The cubic root of 65069381 is about 402.2155824117.

The spelling of 65069381 in words is "sixty-five million, sixty-nine thousand, three hundred eighty-one".