139673601 has 12 divisors (see below), whose sum is σ = 204515428. Its totient is φ = 91839744.

The previous prime is 139673587. The next prime is 139673647. The reversal of 139673601 is 106376931.

It can be written as a sum of positive squares in 2 ways, for example, as 64400625 + 75272976 = 8025^2 + 8676^2 .

It is not a de Polignac number, because 139673601 - 2¹⁸ = 139411457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139673701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105640 + ... + 106953.

It is a Proth number, since it is equal to 8525 ⋅ 2¹⁴ + 1 and 8525 < 2¹⁴.

Almost surely, 2^139673601 is an apocalyptic number.

It is an amenable number.

139673601 is a deficient number, since it is larger than the sum of its proper divisors (64841827).

139673601 is a wasteful number, since it uses less digits than its factorization.

139673601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212672 (or 212669 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 139673601 is about 11818.3586423835. The cubic root of 139673601 is about 518.8455664451.

The spelling of 139673601 in words is "one hundred thirty-nine million, six hundred seventy-three thousand, six hundred one".