427903121 has 2 divisors, whose sum is σ = 427903122. Its totient is φ = 427903120.

The previous prime is 427903081. The next prime is 427903127. The reversal of 427903121 is 121309724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412536721 + 15366400 = 20311^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 427903121 - 2⁶ = 427903057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (427903127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213951560 + 213951561.

It is an arithmetic number, because the mean of its divisors is an integer number (213951561).

Almost surely, 2^427903121 is an apocalyptic number.

It is an amenable number.

427903121 is a deficient number, since it is larger than the sum of its proper divisors (1).

427903121 is an equidigital number, since it uses as much as digits as its factorization.

427903121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 427903121 is about 20685.8193214579. The cubic root of 427903121 is about 753.5553393034. Note that the first 3 decimals are identical.

The spelling of 427903121 in words is "four hundred twenty-seven million, nine hundred three thousand, one hundred twenty-one".