31486382639 has 2 divisors, whose sum is σ = 31486382640. Its totient is φ = 31486382638.

The previous prime is 31486382597. The next prime is 31486382659. The reversal of 31486382639 is 93628368413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31486382639 - 2¹⁶ = 31486317103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31486382659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15743191319 + 15743191320.

It is an arithmetic number, because the mean of its divisors is an integer number (15743191320).

Almost surely, 2^31486382639 is an apocalyptic number.

31486382639 is a deficient number, since it is larger than the sum of its proper divisors (1).

31486382639 is an equidigital number, since it uses as much as digits as its factorization.

31486382639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 53.

The spelling of 31486382639 in words is "thirty-one billion, four hundred eighty-six million, three hundred eighty-two thousand, six hundred thirty-nine".