139761047 has 2 divisors, whose sum is σ = 139761048. Its totient is φ = 139761046.

The previous prime is 139761043. The next prime is 139761077. The reversal of 139761047 is 740167931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139761047 - 2² = 139761043 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139761047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139761043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69880523 + 69880524.

It is an arithmetic number, because the mean of its divisors is an integer number (69880524).

Almost surely, 2^139761047 is an apocalyptic number.

139761047 is a deficient number, since it is larger than the sum of its proper divisors (1).

139761047 is an equidigital number, since it uses as much as digits as its factorization.

139761047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 139761047 is about 11822.0576466197. The cubic root of 139761047 is about 518.9538224168.

The spelling of 139761047 in words is "one hundred thirty-nine million, seven hundred sixty-one thousand, forty-seven".