139303930 has 8 divisors (see below), whose sum is σ = 250747092. Its totient is φ = 55721568.

The previous prime is 139303909. The next prime is 139303949. The reversal of 139303930 is 39303931.

It can be written as a sum of positive squares in 2 ways, for example, as 137569441 + 1734489 = 11729^2 + 1317^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 139303892 and 139303901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6965187 + ... + 6965206.

Almost surely, 2^139303930 is an apocalyptic number.

139303930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139303930 is a deficient number, since it is larger than the sum of its proper divisors (111443162).

139303930 is a wasteful number, since it uses less digits than its factorization.

139303930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930400.

The product of its (nonzero) digits is 6561, while the sum is 31.

The square root of 139303930 is about 11802.7085874387. The cubic root of 139303930 is about 518.3874230305.

Subtracting from 139303930 its reverse (39303931), we obtain a palindrome (99999999).

The spelling of 139303930 in words is "one hundred thirty-nine million, three hundred three thousand, nine hundred thirty".