427768657 has 2 divisors, whose sum is σ = 427768658. Its totient is φ = 427768656.

The previous prime is 427768643. The next prime is 427768727. The reversal of 427768657 is 756867724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221444161 + 206324496 = 14881^2 + 14364^2 .

It is a cyclic number.

It is not a de Polignac number, because 427768657 - 2¹¹ = 427766609 is a prime.

It is not a weakly prime, because it can be changed into another prime (427768057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213884328 + 213884329.

It is an arithmetic number, because the mean of its divisors is an integer number (213884329).

Almost surely, 2^427768657 is an apocalyptic number.

It is an amenable number.

427768657 is a deficient number, since it is larger than the sum of its proper divisors (1).

427768657 is an equidigital number, since it uses as much as digits as its factorization.

427768657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3951360, while the sum is 52.

The square root of 427768657 is about 20682.5689168440. The cubic root of 427768657 is about 753.4763987866.

The spelling of 427768657 in words is "four hundred twenty-seven million, seven hundred sixty-eight thousand, six hundred fifty-seven".