654350381 has 2 divisors, whose sum is σ = 654350382. Its totient is φ = 654350380.

The previous prime is 654350351. The next prime is 654350401. The reversal of 654350381 is 183053456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499746025 + 154604356 = 22355^2 + 12434^2 .

It is a cyclic number.

It is not a de Polignac number, because 654350381 - 2⁶ = 654350317 is a prime.

It is a super-2 number, since 2×654350381² = 856348842229690322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654350311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327175190 + 327175191.

It is an arithmetic number, because the mean of its divisors is an integer number (327175191).

Almost surely, 2^654350381 is an apocalyptic number.

It is an amenable number.

654350381 is a deficient number, since it is larger than the sum of its proper divisors (1).

654350381 is an equidigital number, since it uses as much as digits as its factorization.

654350381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 654350381 is about 25580.2732784464. The cubic root of 654350381 is about 868.1673586454.

The spelling of 654350381 in words is "six hundred fifty-four million, three hundred fifty thousand, three hundred eighty-one".