16763993 has 2 divisors, whose sum is σ = 16763994. Its totient is φ = 16763992.

The previous prime is 16763977. The next prime is 16764017. The reversal of 16763993 is 39936761.

It is a happy number.

16763993 is nontrivially palindromic in base 12.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11042329 + 5721664 = 3323^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 16763993 - 2⁴ = 16763977 is a prime.

It is a super-2 number, since 2×16763993² = 562062922608098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16763933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8381996 + 8381997.

It is an arithmetic number, because the mean of its divisors is an integer number (8381997).

Almost surely, 2^16763993 is an apocalyptic number.

It is an amenable number.

16763993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16763993 is an equidigital number, since it uses as much as digits as its factorization.

16763993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 44.

The square root of 16763993 is about 4094.3855460863. The cubic root of 16763993 is about 255.9327266671.

The spelling of 16763993 in words is "sixteen million, seven hundred sixty-three thousand, nine hundred ninety-three".