65450381 has 2 divisors, whose sum is σ = 65450382. Its totient is φ = 65450380.

The previous prime is 65450369. The next prime is 65450431. The reversal of 65450381 is 18305456.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48302500 + 17147881 = 6950^2 + 4141^2 .

It is a cyclic number.

It is not a de Polignac number, because 65450381 - 2¹⁴ = 65433997 is a prime.

It is a super-2 number, since 2×65450381² = 8567504746090322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65450321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32725190 + 32725191.

It is an arithmetic number, because the mean of its divisors is an integer number (32725191).

Almost surely, 2^65450381 is an apocalyptic number.

It is an amenable number.

65450381 is a deficient number, since it is larger than the sum of its proper divisors (1).

65450381 is an equidigital number, since it uses as much as digits as its factorization.

65450381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 65450381 is about 8090.1409752859. The cubic root of 65450381 is about 402.9990846135. Note that the first 3 decimals are identical.

The spelling of 65450381 in words is "sixty-five million, four hundred fifty thousand, three hundred eighty-one".