16948891 has 2 divisors, whose sum is σ = 16948892. Its totient is φ = 16948890.

The previous prime is 16948879. The next prime is 16948901. The reversal of 16948891 is 19884961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16948891 - 2¹³ = 16940699 is a prime.

It is a super-2 number, since 2×16948891² = 574529812259762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16948691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8474445 + 8474446.

It is an arithmetic number, because the mean of its divisors is an integer number (8474446).

Almost surely, 2^16948891 is an apocalyptic number.

16948891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16948891 is an equidigital number, since it uses as much as digits as its factorization.

16948891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 16948891 is about 4116.9030836297. The cubic root of 16948891 is about 256.8702226977.

It can be divided in two parts, 1694 and 8891, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 16948891 in words is "sixteen million, nine hundred forty-eight thousand, eight hundred ninety-one".