31534730477 has 2 divisors, whose sum is σ = 31534730478. Its totient is φ = 31534730476.

The previous prime is 31534730453. The next prime is 31534730609. The reversal of 31534730477 is 77403743513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28557282121 + 2977448356 = 168989^2 + 54566^2 .

It is an emirp because it is prime and its reverse (77403743513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31534730477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31534730677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767365238 + 15767365239.

It is an arithmetic number, because the mean of its divisors is an integer number (15767365239).

Almost surely, 2^31534730477 is an apocalyptic number.

It is an amenable number.

31534730477 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534730477 is an equidigital number, since it uses as much as digits as its factorization.

31534730477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 44.

The spelling of 31534730477 in words is "thirty-one billion, five hundred thirty-four million, seven hundred thirty thousand, four hundred seventy-seven".