139608863 has 2 divisors, whose sum is σ = 139608864. Its totient is φ = 139608862.

The previous prime is 139608839. The next prime is 139608869. The reversal of 139608863 is 368806931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139608863 - 2¹² = 139604767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139608869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69804431 + 69804432.

It is an arithmetic number, because the mean of its divisors is an integer number (69804432).

Almost surely, 2^139608863 is an apocalyptic number.

139608863 is a deficient number, since it is larger than the sum of its proper divisors (1).

139608863 is an equidigital number, since it uses as much as digits as its factorization.

139608863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 139608863 is about 11815.6194505409. The cubic root of 139608863 is about 518.7653933014.

The spelling of 139608863 in words is "one hundred thirty-nine million, six hundred eight thousand, eight hundred sixty-three".