147692981 has 2 divisors, whose sum is σ = 147692982. Its totient is φ = 147692980.

The previous prime is 147692899. The next prime is 147692983. The reversal of 147692981 is 189296741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135512881 + 12180100 = 11641^2 + 3490^2 .

It is an emirp because it is prime and its reverse (189296741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147692981 - 2¹⁸ = 147430837 is a prime.

It is a super-2 number, since 2×147692981² = 43626433273332722, which contains 22 as substring.

Together with 147692983, it forms a pair of twin primes.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147692983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73846490 + 73846491.

It is an arithmetic number, because the mean of its divisors is an integer number (73846491).

Almost surely, 2^147692981 is an apocalyptic number.

It is an amenable number.

147692981 is a deficient number, since it is larger than the sum of its proper divisors (1).

147692981 is an equidigital number, since it uses as much as digits as its factorization.

147692981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 147692981 is about 12152.9001065589. The cubic root of 147692981 is about 528.5912284593.

The spelling of 147692981 in words is "one hundred forty-seven million, six hundred ninety-two thousand, nine hundred eighty-one".