7199681 has 2 divisors, whose sum is σ = 7199682. Its totient is φ = 7199680.

The previous prime is 7199663. The next prime is 7199683. The reversal of 7199681 is 1869917.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5856400 + 1343281 = 2420^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 7199681 - 2⁶ = 7199617 is a prime.

It is a super-2 number, since 2×7199681² = 103670813003522, which contains 22 as substring.

Together with 7199683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7199683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3599840 + 3599841.

It is an arithmetic number, because the mean of its divisors is an integer number (3599841).

Almost surely, 2^7199681 is an apocalyptic number.

It is an amenable number.

7199681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7199681 is an equidigital number, since it uses as much as digits as its factorization.

7199681 is an evil number, because the sum of its binary digits is even.

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

The square root of 7199681 is about 2683.2221302009. Note that the first 3 decimals coincide. The cubic root of 7199681 is about 193.0950251094.

The spelling of 7199681 in words is "seven million, one hundred ninety-nine thousand, six hundred eighty-one".