31477427 has 2 divisors, whose sum is σ = 31477428. Its totient is φ = 31477426.

The previous prime is 31477423. The next prime is 31477429. The reversal of 31477427 is 72477413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31477427 - 2² = 31477423 is a prime.

Together with 31477429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31477423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15738713 + 15738714.

It is an arithmetic number, because the mean of its divisors is an integer number (15738714).

Almost surely, 2^31477427 is an apocalyptic number.

31477427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31477427 is an equidigital number, since it uses as much as digits as its factorization.

31477427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 35.

The square root of 31477427 is about 5610.4747570950. The cubic root of 31477427 is about 315.7425231334.

The spelling of 31477427 in words is "thirty-one million, four hundred seventy-seven thousand, four hundred twenty-seven".