427270391 has 2 divisors, whose sum is σ = 427270392. Its totient is φ = 427270390.

The previous prime is 427270343. The next prime is 427270409. The reversal of 427270391 is 193072724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427270391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427270331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213635195 + 213635196.

It is an arithmetic number, because the mean of its divisors is an integer number (213635196).

Almost surely, 2^427270391 is an apocalyptic number.

427270391 is a deficient number, since it is larger than the sum of its proper divisors (1).

427270391 is an equidigital number, since it uses as much as digits as its factorization.

427270391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 427270391 is about 20670.5198531629. The cubic root of 427270391 is about 753.1837347282.

The spelling of 427270391 in words is "four hundred twenty-seven million, two hundred seventy thousand, three hundred ninety-one".