16897392769 has 2 divisors, whose sum is σ = 16897392770. Its totient is φ = 16897392768.

The previous prime is 16897392763. The next prime is 16897392781. The reversal of 16897392769 is 96729379861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15753262144 + 1144130625 = 125512^2 + 33825^2 .

It is a cyclic number.

It is not a de Polignac number, because 16897392769 - 2¹⁹ = 16896868481 is a prime.

It is a super-2 number, since 2×16897392769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16897392763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8448696384 + 8448696385.

It is an arithmetic number, because the mean of its divisors is an integer number (8448696385).

Almost surely, 2^16897392769 is an apocalyptic number.

It is an amenable number.

16897392769 is a deficient number, since it is larger than the sum of its proper divisors (1).

16897392769 is an equidigital number, since it uses as much as digits as its factorization.

16897392769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 67.

The spelling of 16897392769 in words is "sixteen billion, eight hundred ninety-seven million, three hundred ninety-two thousand, seven hundred sixty-nine".