2169047997 has 16 divisors (see below), whose sum is σ = 3217679680. Its totient is φ = 1444108176.

The previous prime is 2169047977. The next prime is 2169048001. The reversal of 2169047997 is 7997409612.

2169047997 is a `hidden beast` number, since 2 + 169 + 0 + 479 + 9 + 7 = 666.

It is not a de Polignac number, because 2169047997 - 2⁷ = 2169047869 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 (2169047917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32623 + ... + 73500.

It is an arithmetic number, because the mean of its divisors is an integer number (201104980).

Almost surely, 2^2169047997 is an apocalyptic number.

2169047997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2169047997 is a deficient number, since it is larger than the sum of its proper divisors (1048631683).

2169047997 is a wasteful number, since it uses less digits than its factorization.

2169047997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106889 (or 106883 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 2169047997 is about 46573.0393790227. The cubic root of 2169047997 is about 1294.4632365504.

The spelling of 2169047997 in words is "two billion, one hundred sixty-nine million, forty-seven thousand, nine hundred ninety-seven".