1918697 has 12 divisors (see below), whose sum is σ = 2143428. Its totient is φ = 1716000.

The previous prime is 1918687. The next prime is 1918733. The reversal of 1918697 is 7968191.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1308736 + 609961 = 1144^2 + 781^2 .

It is not a de Polignac number, because 1918697 - 2¹⁶ = 1853161 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 (1918607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12143 + ... + 12299.

It is an arithmetic number, because the mean of its divisors is an integer number (178619).

2^1918697 is an apocalyptic number.

It is an amenable number.

1918697 is a deficient number, since it is larger than the sum of its proper divisors (224731).

1918697 is a wasteful number, since it uses less digits than its factorization.

1918697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 269 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 1918697 is about 1385.1703866312. The cubic root of 1918697 is about 124.2611777369.

It can be divided in two parts, 191 and 8697, that added together give a palindrome (8888).

The spelling of 1918697 in words is "one million, nine hundred eighteen thousand, six hundred ninety-seven".