10178981 has 2 divisors, whose sum is σ = 10178982. Its totient is φ = 10178980.

The previous prime is 10178977. The next prime is 10178983. The reversal of 10178981 is 18987101.

10178981 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 3204100 = 2641^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 10178981 - 2² = 10178977 is a prime.

It is a super-2 number, since 2×10178981² = 207223308396722, which contains 22 as substring.

Together with 10178983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10178983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5089490 + 5089491.

It is an arithmetic number, because the mean of its divisors is an integer number (5089491).

Almost surely, 2^10178981 is an apocalyptic number.

It is an amenable number.

10178981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10178981 is an equidigital number, since it uses as much as digits as its factorization.

10178981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 10178981 is about 3190.4515354413. The cubic root of 10178981 is about 216.7212188738.

The spelling of 10178981 in words is "ten million, one hundred seventy-eight thousand, nine hundred eighty-one".