1916397 has 24 divisors (see below), whose sum is σ = 3332160. Its totient is φ = 1036800.

The previous prime is 1916371. The next prime is 1916413. The reversal of 1916397 is 7936191.

1916397 is a `hidden beast` number, since 19 + 1 + 639 + 7 = 666.

It is not a de Polignac number, because 1916397 - 2⁶ = 1916333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1917397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 397 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (138840).

2^1916397 is an apocalyptic number.

It is an amenable number.

1916397 is a deficient number, since it is larger than the sum of its proper divisors (1415763).

1916397 is a wasteful number, since it uses less digits than its factorization.

1916397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1630 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1916397 is about 1384.3399149053. The cubic root of 1916397 is about 124.2115060093.

The spelling of 1916397 in words is "one million, nine hundred sixteen thousand, three hundred ninety-seven".