139703213 has 4 divisors (see below), whose sum is σ = 150449628. Its totient is φ = 128956800.

The previous prime is 139703197. The next prime is 139703251. The reversal of 139703213 is 312307931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64048009 + 75655204 = 8003^2 + 8698^2 .

It is a cyclic number.

It is not a de Polignac number, because 139703213 - 2⁴ = 139703197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139703293) 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, 5373188 + ... + 5373213.

It is an arithmetic number, because the mean of its divisors is an integer number (37612407).

Almost surely, 2^139703213 is an apocalyptic number.

139703213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

139703213 is a deficient number, since it is larger than the sum of its proper divisors (10746415).

139703213 is a wasteful number, since it uses less digits than its factorization.

139703213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10746414.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 139703213 is about 11819.6113726298. The cubic root of 139703213 is about 518.8822304226.

The spelling of 139703213 in words is "one hundred thirty-nine million, seven hundred three thousand, two hundred thirteen".