139533461 has 2 divisors, whose sum is σ = 139533462. Its totient is φ = 139533460.

The previous prime is 139533451. The next prime is 139533469. The reversal of 139533461 is 164335931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112232836 + 27300625 = 10594^2 + 5225^2 .

It is an emirp because it is prime and its reverse (164335931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139533461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139533469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69766730 + 69766731.

It is an arithmetic number, because the mean of its divisors is an integer number (69766731).

Almost surely, 2^139533461 is an apocalyptic number.

It is an amenable number.

139533461 is a deficient number, since it is larger than the sum of its proper divisors (1).

139533461 is an equidigital number, since it uses as much as digits as its factorization.

139533461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 35.

The square root of 139533461 is about 11812.4282431683. The cubic root of 139533461 is about 518.6719823446.

The spelling of 139533461 in words is "one hundred thirty-nine million, five hundred thirty-three thousand, four hundred sixty-one".