139646801 has 4 divisors (see below), whose sum is σ = 159596352. Its totient is φ = 119697252.

The previous prime is 139646791. The next prime is 139646809. The reversal of 139646801 is 108646931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139646801 - 2¹⁰ = 139645777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139646809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9974765 + ... + 9974778.

It is an arithmetic number, because the mean of its divisors is an integer number (39899088).

Almost surely, 2^139646801 is an apocalyptic number.

It is an amenable number.

139646801 is a deficient number, since it is larger than the sum of its proper divisors (19949551).

139646801 is an equidigital number, since it uses as much as digits as its factorization.

139646801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19949550.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 139646801 is about 11817.2247588002. The cubic root of 139646801 is about 518.8123796665.

The spelling of 139646801 in words is "one hundred thirty-nine million, six hundred forty-six thousand, eight hundred one".