654672761 has 2 divisors, whose sum is σ = 654672762. Its totient is φ = 654672760.

The previous prime is 654672749. The next prime is 654672769. The reversal of 654672761 is 167276456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356454400 + 298218361 = 18880^2 + 17269^2 .

It is a cyclic number.

It is not a de Polignac number, because 654672761 - 2¹⁰ = 654671737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (654672769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327336380 + 327336381.

It is an arithmetic number, because the mean of its divisors is an integer number (327336381).

Almost surely, 2^654672761 is an apocalyptic number.

It is an amenable number.

654672761 is a deficient number, since it is larger than the sum of its proper divisors (1).

654672761 is an equidigital number, since it uses as much as digits as its factorization.

654672761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 44.

The square root of 654672761 is about 25586.5738425448. The cubic root of 654672761 is about 868.3099091050.

The spelling of 654672761 in words is "six hundred fifty-four million, six hundred seventy-two thousand, seven hundred sixty-one".