65367381 has 4 divisors (see below), whose sum is σ = 87156512. Its totient is φ = 43578252.

The previous prime is 65367359. The next prime is 65367389. The reversal of 65367381 is 18376356.

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 not a de Polignac number, because 65367381 - 2⁵ = 65367349 is a prime.

It is a super-2 number, since 2×65367381² = 8545788997598322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65367389) 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, 10894561 + ... + 10894566.

It is an arithmetic number, because the mean of its divisors is an integer number (21789128).

Almost surely, 2^65367381 is an apocalyptic number.

It is an amenable number.

65367381 is a deficient number, since it is larger than the sum of its proper divisors (21789131).

65367381 is a wasteful number, since it uses less digits than its factorization.

65367381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21789130.

The product of its digits is 90720, while the sum is 39.

The square root of 65367381 is about 8085.0096474896. The cubic root of 65367381 is about 402.8286599715.

Subtracting from 65367381 its reverse (18376356), we obtain a square (46991025 = 6855²).

The spelling of 65367381 in words is "sixty-five million, three hundred sixty-seven thousand, three hundred eighty-one".