31534730609 has 2 divisors, whose sum is σ = 31534730610. Its totient is φ = 31534730608.

The previous prime is 31534730477. The next prime is 31534730621. The reversal of 31534730609 is 90603743513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31374328384 + 160402225 = 177128^2 + 12665^2 .

It is an emirp because it is prime and its reverse (90603743513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31534730609 - 2¹² = 31534726513 is a prime.

It is not a weakly prime, because it can be changed into another prime (31534736609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767365304 + 15767365305.

It is an arithmetic number, because the mean of its divisors is an integer number (15767365305).

Almost surely, 2^31534730609 is an apocalyptic number.

It is an amenable number.

31534730609 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534730609 is an equidigital number, since it uses as much as digits as its factorization.

31534730609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 41.

The spelling of 31534730609 in words is "thirty-one billion, five hundred thirty-four million, seven hundred thirty thousand, six hundred nine".