654909381 has 40 divisors (see below), whose sum is σ = 1137090240. Its totient is φ = 367872192.

The previous prime is 654909341. The next prime is 654909391. The reversal of 654909381 is 183909456.

It is a happy number.

654909381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 654909381 - 2⁹ = 654908869 is a prime.

It is a super-2 number, since 2×654909381² = 857812594643606322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654909341) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23665 + ... + 43241.

It is an arithmetic number, because the mean of its divisors is an integer number (28427256).

Almost surely, 2^654909381 is an apocalyptic number.

It is an amenable number.

654909381 is a deficient number, since it is larger than the sum of its proper divisors (482180859).

654909381 is a wasteful number, since it uses less digits than its factorization.

654909381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19655 (or 19646 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 654909381 is about 25591.1973342398. The cubic root of 654909381 is about 868.4145083056.

The spelling of 654909381 in words is "six hundred fifty-four million, nine hundred nine thousand, three hundred eighty-one".