654556139 has 2 divisors, whose sum is σ = 654556140. Its totient is φ = 654556138.

The previous prime is 654556121. The next prime is 654556153. The reversal of 654556139 is 931655456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654556139 - 2²⁴ = 637778923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654556139.

It is not a weakly prime, because it can be changed into another prime (654556109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327278069 + 327278070.

It is an arithmetic number, because the mean of its divisors is an integer number (327278070).

Almost surely, 2^654556139 is an apocalyptic number.

654556139 is a deficient number, since it is larger than the sum of its proper divisors (1).

654556139 is an equidigital number, since it uses as much as digits as its factorization.

654556139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 44.

The square root of 654556139 is about 25584.2947723794. The cubic root of 654556139 is about 868.2583464222.

The spelling of 654556139 in words is "six hundred fifty-four million, five hundred fifty-six thousand, one hundred thirty-nine".