16419797 has 4 divisors (see below), whose sum is σ = 16689036. Its totient is φ = 16150560.

The previous prime is 16419791. The next prime is 16419811. The reversal of 16419797 is 79791461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79791461 = 431 ⋅185131.

It can be written as a sum of positive squares in 2 ways, for example, as 1100401 + 15319396 = 1049^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 16419797 - 2⁸ = 16419541 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 (16419791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134528 + ... + 134649.

It is an arithmetic number, because the mean of its divisors is an integer number (4172259).

Almost surely, 2^16419797 is an apocalyptic number.

It is an amenable number.

16419797 is a deficient number, since it is larger than the sum of its proper divisors (269239).

16419797 is an equidigital number, since it uses as much as digits as its factorization.

16419797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269238.

The product of its digits is 95256, while the sum is 44.

The square root of 16419797 is about 4052.1348694238. The cubic root of 16419797 is about 254.1690083573.

The spelling of 16419797 in words is "sixteen million, four hundred nineteen thousand, seven hundred ninety-seven".