427621069 has 2 divisors, whose sum is σ = 427621070. Its totient is φ = 427621068.

The previous prime is 427621031. The next prime is 427621091. The reversal of 427621069 is 960126724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424154025 + 3467044 = 20595^2 + 1862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427621069 is a prime.

It is a super-2 number, since 2×427621069² = 365719557305405522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427021069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213810534 + 213810535.

It is an arithmetic number, because the mean of its divisors is an integer number (213810535).

Almost surely, 2^427621069 is an apocalyptic number.

It is an amenable number.

427621069 is a deficient number, since it is larger than the sum of its proper divisors (1).

427621069 is an equidigital number, since it uses as much as digits as its factorization.

427621069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 427621069 is about 20679.0006770153. Note that the first 3 decimals coincide. The cubic root of 427621069 is about 753.3897344455.

The spelling of 427621069 in words is "four hundred twenty-seven million, six hundred twenty-one thousand, sixty-nine".