16963421 has 4 divisors (see below), whose sum is σ = 17085600. Its totient is φ = 16841244.

The previous prime is 16963411. The next prime is 16963439. The reversal of 16963421 is 12436961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12436961 = 787 ⋅15803.

It is a cyclic number.

It is not a de Polignac number, because 16963421 - 2¹⁸ = 16701277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16963411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60881 + ... + 61158.

It is an arithmetic number, because the mean of its divisors is an integer number (4271400).

Almost surely, 2^16963421 is an apocalyptic number.

It is an amenable number.

16963421 is a deficient number, since it is larger than the sum of its proper divisors (122179).

16963421 is a wasteful number, since it uses less digits than its factorization.

16963421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122178.

The product of its digits is 7776, while the sum is 32.

The square root of 16963421 is about 4118.6673815689. The cubic root of 16963421 is about 256.9436052432.

The spelling of 16963421 in words is "sixteen million, nine hundred sixty-three thousand, four hundred twenty-one".