139281463 has 2 divisors, whose sum is σ = 139281464. Its totient is φ = 139281462.

The previous prime is 139281437. The next prime is 139281487. The reversal of 139281463 is 364182931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139281463 - 2¹³ = 139273271 is a prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69640731 + 69640732.

It is an arithmetic number, because the mean of its divisors is an integer number (69640732).

Almost surely, 2^139281463 is an apocalyptic number.

139281463 is a deficient number, since it is larger than the sum of its proper divisors (1).

139281463 is an equidigital number, since it uses as much as digits as its factorization.

139281463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 139281463 is about 11801.7567760059. The cubic root of 139281463 is about 518.3595529472.

The spelling of 139281463 in words is "one hundred thirty-nine million, two hundred eighty-one thousand, four hundred sixty-three".