427657427731 has 2 divisors, whose sum is σ = 427657427732. Its totient is φ = 427657427730.

The previous prime is 427657427723. The next prime is 427657427741. The reversal of 427657427731 is 137724756724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 427657427731 - 2³ = 427657427723 is a prime.

It is a super-2 number, since 2×427657427731² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427657427741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213828713865 + 213828713866.

It is an arithmetic number, because the mean of its divisors is an integer number (213828713866).

Almost surely, 2^427657427731 is an apocalyptic number.

427657427731 is a deficient number, since it is larger than the sum of its proper divisors (1).

427657427731 is an equidigital number, since it uses as much as digits as its factorization.

427657427731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13829760, while the sum is 55.

The spelling of 427657427731 in words is "four hundred twenty-seven billion, six hundred fifty-seven million, four hundred twenty-seven thousand, seven hundred thirty-one".