139249834 has 4 divisors (see below), whose sum is σ = 208874754. Its totient is φ = 69624916.

The previous prime is 139249829. The next prime is 139249837. The reversal of 139249834 is 438942931.

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., 138886225 + 363609 = 11785^2 + 603^2 .

It is not an unprimeable number, because it can be changed into a prime (139249837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34812457 + ... + 34812460.

Almost surely, 2^139249834 is an apocalyptic number.

139249834 is a deficient number, since it is larger than the sum of its proper divisors (69624920).

139249834 is an equidigital number, since it uses as much as digits as its factorization.

139249834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69624919.

The product of its digits is 186624, while the sum is 43.

The square root of 139249834 is about 11800.4166875581. The cubic root of 139249834 is about 518.3203124167.

The spelling of 139249834 in words is "one hundred thirty-nine million, two hundred forty-nine thousand, eight hundred thirty-four".