208290929039 has 4 divisors (see below), whose sum is σ = 208341847560. Its totient is φ = 208240010520.

The previous prime is 208290929029. The next prime is 208290929057. The reversal of 208290929039 is 930929092802.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208290929039 is a prime.

It is a super-2 number, since 2×208290929039² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208290929009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25453124 + ... + 25461305.

It is an arithmetic number, because the mean of its divisors is an integer number (52085461890).

Almost surely, 2^208290929039 is an apocalyptic number.

208290929039 is a deficient number, since it is larger than the sum of its proper divisors (50918521).

208290929039 is an equidigital number, since it uses as much as digits as its factorization.

208290929039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50918520.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 208290929039 in words is "two hundred eight billion, two hundred ninety million, nine hundred twenty-nine thousand, thirty-nine".