139144305 has 8 divisors (see below), whose sum is σ = 222630912. Its totient is φ = 74210288.

The previous prime is 139144301. The next prime is 139144321. The reversal of 139144305 is 503441931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139144305 - 2² = 139144301 is a prime.

It is a super-2 number, since 2×139144305² = 38722275227866050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139144301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4638129 + ... + 4638158.

It is an arithmetic number, because the mean of its divisors is an integer number (27828864).

Almost surely, 2^139144305 is an apocalyptic number.

139144305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139144305 is a deficient number, since it is larger than the sum of its proper divisors (83486607).

139144305 is an equidigital number, since it uses as much as digits as its factorization.

139144305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9276295.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 139144305 is about 11795.9444301845. The cubic root of 139144305 is about 518.1893448220.

The spelling of 139144305 in words is "one hundred thirty-nine million, one hundred forty-four thousand, three hundred five".