139743577 has 2 divisors, whose sum is σ = 139743578. Its totient is φ = 139743576.

The previous prime is 139743557. The next prime is 139743601. The reversal of 139743577 is 775347931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127148176 + 12595401 = 11276^2 + 3549^2 .

It is an emirp because it is prime and its reverse (775347931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139743577 - 2²³ = 131354969 is a prime.

It is equal to p_7898473 and since 139743577 and 7898473 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (139743557) 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, 69871788 + 69871789.

It is an arithmetic number, because the mean of its divisors is an integer number (69871789).

Almost surely, 2^139743577 is an apocalyptic number.

It is an amenable number.

139743577 is a deficient number, since it is larger than the sum of its proper divisors (1).

139743577 is an equidigital number, since it uses as much as digits as its factorization.

139743577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 46.

The square root of 139743577 is about 11821.3187504610. The cubic root of 139743577 is about 518.9321986018.

The spelling of 139743577 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, five hundred seventy-seven".