139503106 has 4 divisors (see below), whose sum is σ = 209254662. Its totient is φ = 69751552.

The previous prime is 139503101. The next prime is 139503107. The reversal of 139503106 is 601305931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601305931 = 467 ⋅1287593.

It can be written as a sum of positive squares in only one way, i.e., 139452481 + 50625 = 11809^2 + 225^2 .

It is a super-2 number, since 2×139503106² = 38922233167294472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139503101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34875775 + ... + 34875778.

Almost surely, 2^139503106 is an apocalyptic number.

139503106 is a deficient number, since it is larger than the sum of its proper divisors (69751556).

139503106 is an equidigital number, since it uses as much as digits as its factorization.

139503106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69751555.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 139503106 is about 11811.1432977506. The cubic root of 139503106 is about 518.6343678786.

The spelling of 139503106 in words is "one hundred thirty-nine million, five hundred three thousand, one hundred six".