147438961 has 2 divisors, whose sum is σ = 147438962. Its totient is φ = 147438960.

The previous prime is 147438931. The next prime is 147438979. The reversal of 147438961 is 169834741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145950561 + 1488400 = 12081^2 + 1220^2 .

It is an emirp because it is prime and its reverse (169834741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147438961 - 2²⁷ = 13221233 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (147438931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73719480 + 73719481.

It is an arithmetic number, because the mean of its divisors is an integer number (73719481).

Almost surely, 2^147438961 is an apocalyptic number.

It is an amenable number.

147438961 is a deficient number, since it is larger than the sum of its proper divisors (1).

147438961 is an equidigital number, since it uses as much as digits as its factorization.

147438961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 147438961 is about 12142.4446055973. Note that the first 3 decimals coincide. The cubic root of 147438961 is about 528.2880098139.

The spelling of 147438961 in words is "one hundred forty-seven million, four hundred thirty-eight thousand, nine hundred sixty-one".