139821265783 has 4 divisors (see below), whose sum is σ = 139823953560. Its totient is φ = 139818578008.

The previous prime is 139821265747. The next prime is 139821265789. The reversal of 139821265783 is 387562128931.

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

It is a cyclic number.

It is not a de Polignac number, because 139821265783 - 2²⁵ = 139787711351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139821265789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264285 + ... + 1370422.

It is an arithmetic number, because the mean of its divisors is an integer number (34955988390).

Almost surely, 2^139821265783 is an apocalyptic number.

139821265783 is a deficient number, since it is larger than the sum of its proper divisors (2687777).

139821265783 is an equidigital number, since it uses as much as digits as its factorization.

139821265783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687776.

The product of its digits is 4354560, while the sum is 55.

The spelling of 139821265783 in words is "one hundred thirty-nine billion, eight hundred twenty-one million, two hundred sixty-five thousand, seven hundred eighty-three".