427921069 has 2 divisors, whose sum is σ = 427921070. Its totient is φ = 427921068.

The previous prime is 427921057. The next prime is 427921111. The reversal of 427921069 is 960129724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363359844 + 64561225 = 19062^2 + 8035^2 .

It is a cyclic number.

It is not a de Polignac number, because 427921069 - 2⁵ = 427921037 is a prime.

It is a super-2 number, since 2×427921069² = 366232882588205522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427921009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213960534 + 213960535.

It is an arithmetic number, because the mean of its divisors is an integer number (213960535).

Almost surely, 2^427921069 is an apocalyptic number.

It is an amenable number.

427921069 is a deficient number, since it is larger than the sum of its proper divisors (1).

427921069 is an equidigital number, since it uses as much as digits as its factorization.

427921069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 427921069 is about 20686.2531406729. The cubic root of 427921069 is about 753.5658748829.

The spelling of 427921069 in words is "four hundred twenty-seven million, nine hundred twenty-one thousand, sixty-nine".