39099921169 has 9 divisors (see below), whose sum is σ = 39616949673. Its totient is φ = 38589561972.

The previous prime is 39099921167. The next prime is 39099921193. The reversal of 39099921169 is 96112999093.

The square root of 39099921169 is 197737.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 39099921169 - 2¹ = 39099921167 is a prime.

It is a super-2 number, since 2×39099921169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39099921167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15619972 + ... + 15622474.

It is an arithmetic number, because the mean of its divisors is an integer number (4401883297).

Almost surely, 2^39099921169 is an apocalyptic number.

39099921169 is the 197737-th square number.

39099921169 is the 98869-th centered octagonal number.

It is an amenable number.

39099921169 is a deficient number, since it is larger than the sum of its proper divisors (517028504).

39099921169 is an frugal number, since it uses more digits than its factorization.

39099921169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164 (or 2582 counting only the distinct ones).

The product of its (nonzero) digits is 2125764, while the sum is 58.

The spelling of 39099921169 in words is "thirty-nine billion, ninety-nine million, nine hundred twenty-one thousand, one hundred sixty-nine".