654321077 has 2 divisors, whose sum is σ = 654321078. Its totient is φ = 654321076.

The previous prime is 654321071. The next prime is 654321079. The reversal of 654321077 is 770123456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478996996 + 175324081 = 21886^2 + 13241^2 .

It is a cyclic number.

It is not a de Polignac number, because 654321077 - 2²² = 650126773 is a prime.

Together with 654321079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654321071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327160538 + 327160539.

It is an arithmetic number, because the mean of its divisors is an integer number (327160539).

Almost surely, 2^654321077 is an apocalyptic number.

It is an amenable number.

654321077 is a deficient number, since it is larger than the sum of its proper divisors (1).

654321077 is an equidigital number, since it uses as much as digits as its factorization.

654321077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 654321077 is about 25579.7004869095. The cubic root of 654321077 is about 868.1543986386.

The spelling of 654321077 in words is "six hundred fifty-four million, three hundred twenty-one thousand, seventy-seven".