139497925106 has 4 divisors (see below), whose sum is σ = 209246887662. Its totient is φ = 69748962552.

The previous prime is 139497925103. The next prime is 139497925187. The reversal of 139497925106 is 601529794931.

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

It can be written as a sum of positive squares in only one way, i.e., 126355366225 + 13142558881 = 355465^2 + 114641^2 .

It is a super-2 number, since 2×139497925106² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139497925103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34874481275 + ... + 34874481278.

Almost surely, 2^139497925106 is an apocalyptic number.

139497925106 is a deficient number, since it is larger than the sum of its proper divisors (69748962556).

139497925106 is an equidigital number, since it uses as much as digits as its factorization.

139497925106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69748962555.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 139497925106 in words is "one hundred thirty-nine billion, four hundred ninety-seven million, nine hundred twenty-five thousand, one hundred six".