427813831 has 2 divisors, whose sum is σ = 427813832. Its totient is φ = 427813830.

The previous prime is 427813807. The next prime is 427813843. The reversal of 427813831 is 138318724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427813831 - 2⁷ = 427813703 is a prime.

It is a super-2 number, since 2×427813831² = 366049347989793122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427813031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213906915 + 213906916.

It is an arithmetic number, because the mean of its divisors is an integer number (213906916).

Almost surely, 2^427813831 is an apocalyptic number.

427813831 is a deficient number, since it is larger than the sum of its proper divisors (1).

427813831 is an equidigital number, since it uses as much as digits as its factorization.

427813831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 427813831 is about 20683.6609670532. The cubic root of 427813831 is about 753.5029211791.

The spelling of 427813831 in words is "four hundred twenty-seven million, eight hundred thirteen thousand, eight hundred thirty-one".