139706230209 has 64 divisors (see below), whose sum is σ = 233665044480. Its totient is φ = 72282481920.

The previous prime is 139706230199. The next prime is 139706230211. The reversal of 139706230209 is 902032607931.

It is not a de Polignac number, because 139706230209 - 2¹⁶ = 139706164673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139706230249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6100222 + ... + 6123080.

It is an arithmetic number, because the mean of its divisors is an integer number (3651016320).

Almost surely, 2^139706230209 is an apocalyptic number.

It is an amenable number.

139706230209 is a deficient number, since it is larger than the sum of its proper divisors (93958814271).

139706230209 is a wasteful number, since it uses less digits than its factorization.

139706230209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23310.

The product of its (nonzero) digits is 122472, while the sum is 42.

The spelling of 139706230209 in words is "one hundred thirty-nine billion, seven hundred six million, two hundred thirty thousand, two hundred nine".