427220029 has 2 divisors, whose sum is σ = 427220030. Its totient is φ = 427220028.

The previous prime is 427220011. The next prime is 427220033. The reversal of 427220029 is 920022724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426216025 + 1004004 = 20645^2 + 1002^2 .

It is a cyclic number.

It is not a de Polignac number, because 427220029 - 2¹⁷ = 427088957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 427219979 and 427220006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427220039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610014 + 213610015.

It is an arithmetic number, because the mean of its divisors is an integer number (213610015).

Almost surely, 2^427220029 is an apocalyptic number.

It is an amenable number.

427220029 is a deficient number, since it is larger than the sum of its proper divisors (1).

427220029 is an equidigital number, since it uses as much as digits as its factorization.

427220029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 427220029 is about 20669.3016089078. The cubic root of 427220029 is about 753.1541411886.

The spelling of 427220029 in words is "four hundred twenty-seven million, two hundred twenty thousand, twenty-nine".