15068981 has 2 divisors, whose sum is σ = 15068982. Its totient is φ = 15068980.

The previous prime is 15068959. The next prime is 15068983. The reversal of 15068981 is 18986051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 2402500 = 3559^2 + 1550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15068981 is a prime.

It is a super-2 number, since 2×15068981² = 454148376756722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 15068983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15068983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7534490 + 7534491.

It is an arithmetic number, because the mean of its divisors is an integer number (7534491).

Almost surely, 2^15068981 is an apocalyptic number.

It is an amenable number.

15068981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15068981 is an equidigital number, since it uses as much as digits as its factorization.

15068981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 15068981 is about 3881.8785400885. The cubic root of 15068981 is about 246.9986777836.

The spelling of 15068981 in words is "fifteen million, sixty-eight thousand, nine hundred eighty-one".