139663541 has 2 divisors, whose sum is σ = 139663542. Its totient is φ = 139663540.

The previous prime is 139663499. The next prime is 139663583. The reversal of 139663541 is 145366931.

It is a balanced prime because it is at equal distance from previous prime (139663499) and next prime (139663583).

It can be written as a sum of positive squares in only one way, i.e., 131767441 + 7896100 = 11479^2 + 2810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139663541 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139663495 and 139663504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139663841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69831770 + 69831771.

It is an arithmetic number, because the mean of its divisors is an integer number (69831771).

Almost surely, 2^139663541 is an apocalyptic number.

It is an amenable number.

139663541 is a deficient number, since it is larger than the sum of its proper divisors (1).

139663541 is an equidigital number, since it uses as much as digits as its factorization.

139663541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 139663541 is about 11817.9330257029. The cubic root of 139663541 is about 518.8331095177.

The spelling of 139663541 in words is "one hundred thirty-nine million, six hundred sixty-three thousand, five hundred forty-one".