427667731 has 2 divisors, whose sum is σ = 427667732. Its totient is φ = 427667730.

The previous prime is 427667729. The next prime is 427667743. The reversal of 427667731 is 137766724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 427667731 - 2¹ = 427667729 is a prime.

It is a super-2 number, since 2×427667731² = 365799376277376722, which contains 22 as substring.

Together with 427667729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (427667771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213833865 + 213833866.

It is an arithmetic number, because the mean of its divisors is an integer number (213833866).

Almost surely, 2^427667731 is an apocalyptic number.

427667731 is a deficient number, since it is larger than the sum of its proper divisors (1).

427667731 is an equidigital number, since it uses as much as digits as its factorization.

427667731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 43.

The square root of 427667731 is about 20680.1288922482. The cubic root of 427667731 is about 753.4171367383.

The spelling of 427667731 in words is "four hundred twenty-seven million, six hundred sixty-seven thousand, seven hundred thirty-one".