147098981 has 2 divisors, whose sum is σ = 147098982. Its totient is φ = 147098980.

The previous prime is 147098947. The next prime is 147098989. The reversal of 147098981 is 189890741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115906756 + 31192225 = 10766^2 + 5585^2 .

It is an emirp because it is prime and its reverse (189890741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147098981 - 2¹⁴ = 147082597 is a prime.

It is a super-2 number, since 2×147098981² = 43276220422476722, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147098989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73549490 + 73549491.

It is an arithmetic number, because the mean of its divisors is an integer number (73549491).

Almost surely, 2^147098981 is an apocalyptic number.

It is an amenable number.

147098981 is a deficient number, since it is larger than the sum of its proper divisors (1).

147098981 is an equidigital number, since it uses as much as digits as its factorization.

147098981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 147098981 is about 12128.4368737278. The cubic root of 147098981 is about 527.8816369305.

The spelling of 147098981 in words is "one hundred forty-seven million, ninety-eight thousand, nine hundred eighty-one".