39997200049 has 9 divisors (see below), whose sum is σ = 40957805529. Its totient is φ = 39058632900.

The previous prime is 39997200043. The next prime is 39997200053. The reversal of 39997200049 is 94000279993.

The square root of 39997200049 is 199993.

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

It is not a de Polignac number, because 39997200049 - 2¹⁵ = 39997167281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39997199969 and 39997200005.

It is not an unprimeable number, because it can be changed into a prime (39997200043) 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, 8597374 + ... + 8602024.

It is an arithmetic number, because the mean of its divisors is an integer number (4550867281).

Almost surely, 2^39997200049 is an apocalyptic number.

39997200049 is the 199993-rd square number.

39997200049 is the 99997-th centered octagonal number.

It is an amenable number.

39997200049 is a deficient number, since it is larger than the sum of its proper divisors (960605480).

39997200049 is an frugal number, since it uses more digits than its factorization.

39997200049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9388 (or 4694 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 39997200049 in words is "thirty-nine billion, nine hundred ninety-seven million, two hundred thousand, forty-nine".