102266981 has 2 divisors, whose sum is σ = 102266982. Its totient is φ = 102266980.

The previous prime is 102266893. The next prime is 102267013. The reversal of 102266981 is 189662201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73376356 + 28890625 = 8566^2 + 5375^2 .

It is an emirp because it is prime and its reverse (189662201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102266981 - 2²⁶ = 35158117 is a prime.

It is a super-2 number, since 2×102266981² = 20917070805708722, which contains 22 as substring.

It is equal to p_5884514 and since 102266981 and 5884514 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102266581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51133490 + 51133491.

It is an arithmetic number, because the mean of its divisors is an integer number (51133491).

Almost surely, 2^102266981 is an apocalyptic number.

It is an amenable number.

102266981 is a deficient number, since it is larger than the sum of its proper divisors (1).

102266981 is an equidigital number, since it uses as much as digits as its factorization.

102266981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 102266981 is about 10112.7138296305. The cubic root of 102266981 is about 467.6401722525.

The spelling of 102266981 in words is "one hundred two million, two hundred sixty-six thousand, nine hundred eighty-one".