654131813 has 2 divisors, whose sum is σ = 654131814. Its totient is φ = 654131812.

The previous prime is 654131789. The next prime is 654131833. The reversal of 654131813 is 318131456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607031044 + 47100769 = 24638^2 + 6863^2 .

It is a cyclic number.

It is not a de Polignac number, because 654131813 - 2²⁶ = 587022949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654131813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654131833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327065906 + 327065907.

It is an arithmetic number, because the mean of its divisors is an integer number (327065907).

Almost surely, 2^654131813 is an apocalyptic number.

It is an amenable number.

654131813 is a deficient number, since it is larger than the sum of its proper divisors (1).

654131813 is an equidigital number, since it uses as much as digits as its factorization.

654131813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 654131813 is about 25576.0007233344. Note that the first 3 decimals coincide. The cubic root of 654131813 is about 868.0706852932.

The spelling of 654131813 in words is "six hundred fifty-four million, one hundred thirty-one thousand, eight hundred thirteen".