139320427 has 4 divisors (see below), whose sum is σ = 141229000. Its totient is φ = 137411856.

The previous prime is 139320409. The next prime is 139320431. The reversal of 139320427 is 724023931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139320427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139320487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954177 + ... + 954322.

It is an arithmetic number, because the mean of its divisors is an integer number (35307250).

Almost surely, 2^139320427 is an apocalyptic number.

139320427 is a deficient number, since it is larger than the sum of its proper divisors (1908573).

139320427 is an equidigital number, since it uses as much as digits as its factorization.

139320427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908572.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 139320427 is about 11803.4074317546. The cubic root of 139320427 is about 518.4078854821.

The spelling of 139320427 in words is "one hundred thirty-nine million, three hundred twenty thousand, four hundred twenty-seven".