139431163 has 2 divisors, whose sum is σ = 139431164. Its totient is φ = 139431162.

The previous prime is 139431151. The next prime is 139431179. The reversal of 139431163 is 361134931.

It is a weak prime.

It is an emirp because it is prime and its reverse (361134931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139431163 - 2¹³ = 139422971 is a prime.

It is not a weakly prime, because it can be changed into another prime (139431763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69715581 + 69715582.

It is an arithmetic number, because the mean of its divisors is an integer number (69715582).

Almost surely, 2^139431163 is an apocalyptic number.

139431163 is a deficient number, since it is larger than the sum of its proper divisors (1).

139431163 is an equidigital number, since it uses as much as digits as its factorization.

139431163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 139431163 is about 11808.0973488535. The cubic root of 139431163 is about 518.5451977535.

The spelling of 139431163 in words is "one hundred thirty-nine million, four hundred thirty-one thousand, one hundred sixty-three".