654931 has 2 divisors, whose sum is σ = 654932. Its totient is φ = 654930.

The previous prime is 654923. The next prime is 654943. The reversal of 654931 is 139456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654931 - 2³ = 654923 is a prime.

It is a super-2 number, since 2×654931² = 857869229522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 654931.

It is not a weakly prime, because it can be changed into another prime (654991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327465 + 327466.

It is an arithmetic number, because the mean of its divisors is an integer number (327466).

2⁶⁵⁴⁹³¹ is an apocalyptic number.

654931 is a deficient number, since it is larger than the sum of its proper divisors (1).

654931 is an equidigital number, since it uses as much as digits as its factorization.

654931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 654931 is about 809.2780733469. The cubic root of 654931 is about 86.8424063850.

The spelling of 654931 in words is "six hundred fifty-four thousand, nine hundred thirty-one".