139143601 has 2 divisors, whose sum is σ = 139143602. Its totient is φ = 139143600.

The previous prime is 139143553. The next prime is 139143611. The reversal of 139143601 is 106341931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114383025 + 24760576 = 10695^2 + 4976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139143601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139143601.

It is not a weakly prime, because it can be changed into another prime (139143611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69571800 + 69571801.

It is an arithmetic number, because the mean of its divisors is an integer number (69571801).

Almost surely, 2^139143601 is an apocalyptic number.

It is an amenable number.

139143601 is a deficient number, since it is larger than the sum of its proper divisors (1).

139143601 is an equidigital number, since it uses as much as digits as its factorization.

139143601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 139143601 is about 11795.9145893822. The cubic root of 139143601 is about 518.1884708949.

The spelling of 139143601 in words is "one hundred thirty-nine million, one hundred forty-three thousand, six hundred one".