31430246387 has 2 divisors, whose sum is σ = 31430246388. Its totient is φ = 31430246386.

The previous prime is 31430246347. The next prime is 31430246479. The reversal of 31430246387 is 78364203413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31430246387 - 2²⁸ = 31161810931 is a prime.

It is not a weakly prime, because it can be changed into another prime (31430246317) 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, 15715123193 + 15715123194.

It is an arithmetic number, because the mean of its divisors is an integer number (15715123194).

Almost surely, 2^31430246387 is an apocalyptic number.

31430246387 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430246387 is an equidigital number, since it uses as much as digits as its factorization.

31430246387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 31430246387 in words is "thirty-one billion, four hundred thirty million, two hundred forty-six thousand, three hundred eighty-seven".