16764891 has 16 divisors (see below), whose sum is σ = 26261760. Its totient is φ = 9378720.

The previous prime is 16764877. The next prime is 16764899. The reversal of 16764891 is 19846761.

It is not a de Polignac number, because 16764891 - 2⁹ = 16764379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16764899) 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, 19111 + ... + 19968.

It is an arithmetic number, because the mean of its divisors is an integer number (1641360).

Almost surely, 2^16764891 is an apocalyptic number.

16764891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16764891 is a deficient number, since it is larger than the sum of its proper divisors (9496869).

16764891 is a wasteful number, since it uses less digits than its factorization.

16764891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39106.

The product of its digits is 72576, while the sum is 42.

The square root of 16764891 is about 4094.4952069822. The cubic root of 16764891 is about 255.9372964512.

The spelling of 16764891 in words is "sixteen million, seven hundred sixty-four thousand, eight hundred ninety-one".