654931493 has 2 divisors, whose sum is σ = 654931494. Its totient is φ = 654931492.

The previous prime is 654931483. The next prime is 654931517. The reversal of 654931493 is 394139456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526381249 + 128550244 = 22943^2 + 11338^2 .

It is a cyclic number.

It is not a de Polignac number, because 654931493 - 2⁶ = 654931429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654931423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327465746 + 327465747.

It is an arithmetic number, because the mean of its divisors is an integer number (327465747).

Almost surely, 2^654931493 is an apocalyptic number.

It is an amenable number.

654931493 is a deficient number, since it is larger than the sum of its proper divisors (1).

654931493 is an equidigital number, since it uses as much as digits as its factorization.

654931493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 654931493 is about 25591.6293541462. The cubic root of 654931493 is about 868.4242817522.

The spelling of 654931493 in words is "six hundred fifty-four million, nine hundred thirty-one thousand, four hundred ninety-three".