83427431 has 2 divisors, whose sum is σ = 83427432. Its totient is φ = 83427430.

The previous prime is 83427427. The next prime is 83427433. The reversal of 83427431 is 13472438.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83427431 - 2² = 83427427 is a prime.

It is a super-2 number, since 2×83427431² = 13920272486519522, which contains 22 as substring.

Together with 83427433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83427433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41713715 + 41713716.

It is an arithmetic number, because the mean of its divisors is an integer number (41713716).

Almost surely, 2^83427431 is an apocalyptic number.

83427431 is a deficient number, since it is larger than the sum of its proper divisors (1).

83427431 is an equidigital number, since it uses as much as digits as its factorization.

83427431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 83427431 is about 9133.8617791162. The cubic root of 83427431 is about 436.9545742936.

Adding to 83427431 its reverse (13472438), we get a palindrome (96899869).

The spelling of 83427431 in words is "eighty-three million, four hundred twenty-seven thousand, four hundred thirty-one".