654430531 has 2 divisors, whose sum is σ = 654430532. Its totient is φ = 654430530.

The previous prime is 654430519. The next prime is 654430541. The reversal of 654430531 is 135034456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654430531 - 2¹¹ = 654428483 is a prime.

It is a super-2 number, since 2×654430531² = 856558639809883922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 654430493 and 654430502.

It is not a weakly prime, because it can be changed into another prime (654430541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327215265 + 327215266.

It is an arithmetic number, because the mean of its divisors is an integer number (327215266).

Almost surely, 2^654430531 is an apocalyptic number.

654430531 is a deficient number, since it is larger than the sum of its proper divisors (1).

654430531 is an equidigital number, since it uses as much as digits as its factorization.

654430531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 654430531 is about 25581.8398673747. The cubic root of 654430531 is about 868.2028038620.

Adding to 654430531 its reverse (135034456), we get a palindrome (789464987).

The spelling of 654430531 in words is "six hundred fifty-four million, four hundred thirty thousand, five hundred thirty-one".