139221959 has 8 divisors (see below), whose sum is σ = 149189040. Its totient is φ = 129452416.

The previous prime is 139221941. The next prime is 139221977. The reversal of 139221959 is 959122931.

139221959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139221941) and next prime (139221977).

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

It is not a de Polignac number, because 139221959 - 2¹² = 139217863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139221059) 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, 47924 + ... + 50745.

It is an arithmetic number, because the mean of its divisors is an integer number (18648630).

Almost surely, 2^139221959 is an apocalyptic number.

139221959 is a deficient number, since it is larger than the sum of its proper divisors (9967081).

139221959 is an equidigital number, since it uses as much as digits as its factorization.

139221959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98769.

The product of its digits is 43740, while the sum is 41.

The square root of 139221959 is about 11799.2355260839. The cubic root of 139221959 is about 518.2857243613.

The spelling of 139221959 in words is "one hundred thirty-nine million, two hundred twenty-one thousand, nine hundred fifty-nine".