139762906 has 4 divisors (see below), whose sum is σ = 209644362. Its totient is φ = 69881452.

The previous prime is 139762853. The next prime is 139762907. The reversal of 139762906 is 609267931.

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., 83887281 + 55875625 = 9159^2 + 7475^2 .

It is not an unprimeable number, because it can be changed into a prime (139762907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34940725 + ... + 34940728.

Almost surely, 2^139762906 is an apocalyptic number.

139762906 is a deficient number, since it is larger than the sum of its proper divisors (69881456).

139762906 is an equidigital number, since it uses as much as digits as its factorization.

139762906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69881455.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 139762906 is about 11822.1362705731. The cubic root of 139762906 is about 518.9561233222.

The spelling of 139762906 in words is "one hundred thirty-nine million, seven hundred sixty-two thousand, nine hundred six".