16986925973 has 2 divisors, whose sum is σ = 16986925974. Its totient is φ = 16986925972.

The previous prime is 16986925937. The next prime is 16986925981. The reversal of 16986925973 is 37952968961.

Together with previous prime (16986925937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13655558449 + 3331367524 = 116857^2 + 57718^2 .

It is a cyclic number.

It is not a de Polignac number, because 16986925973 - 2¹⁰ = 16986924949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16986925273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8493462986 + 8493462987.

It is an arithmetic number, because the mean of its divisors is an integer number (8493462987).

Almost surely, 2^16986925973 is an apocalyptic number.

It is an amenable number.

16986925973 is a deficient number, since it is larger than the sum of its proper divisors (1).

16986925973 is an equidigital number, since it uses as much as digits as its factorization.

16986925973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 65.

The spelling of 16986925973 in words is "sixteen billion, nine hundred eighty-six million, nine hundred twenty-five thousand, nine hundred seventy-three".