654291439 has 2 divisors, whose sum is σ = 654291440. Its totient is φ = 654291438.

The previous prime is 654291431. The next prime is 654291457. The reversal of 654291439 is 934192456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654291439 - 2³ = 654291431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654291395 and 654291404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654291431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327145719 + 327145720.

It is an arithmetic number, because the mean of its divisors is an integer number (327145720).

Almost surely, 2^654291439 is an apocalyptic number.

654291439 is a deficient number, since it is larger than the sum of its proper divisors (1).

654291439 is an equidigital number, since it uses as much as digits as its factorization.

654291439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 654291439 is about 25579.1211537848. The cubic root of 654291439 is about 868.1412905232.

The spelling of 654291439 in words is "six hundred fifty-four million, two hundred ninety-one thousand, four hundred thirty-nine".