139300426 has 4 divisors (see below), whose sum is σ = 208950642. Its totient is φ = 69650212.

The previous prime is 139300373. The next prime is 139300429. The reversal of 139300426 is 624003931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624003931 = 2347 ⋅265873.

It can be written as a sum of positive squares in only one way, i.e., 136913401 + 2387025 = 11701^2 + 1545^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139300394 and 139300403.

It is not an unprimeable number, because it can be changed into a prime (139300429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34825105 + ... + 34825108.

Almost surely, 2^139300426 is an apocalyptic number.

139300426 is a deficient number, since it is larger than the sum of its proper divisors (69650216).

139300426 is an equidigital number, since it uses as much as digits as its factorization.

139300426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69650215.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 139300426 is about 11802.5601460022. The cubic root of 139300426 is about 518.3830765517.

The spelling of 139300426 in words is "one hundred thirty-nine million, three hundred thousand, four hundred twenty-six".