147070921 has 2 divisors, whose sum is σ = 147070922. Its totient is φ = 147070920.

The previous prime is 147070873. The next prime is 147070981. The reversal of 147070921 is 129070741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114169225 + 32901696 = 10685^2 + 5736^2 .

It is a cyclic number.

It is not a de Polignac number, because 147070921 - 2⁹ = 147070409 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 (147070981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73535460 + 73535461.

It is an arithmetic number, because the mean of its divisors is an integer number (73535461).

Almost surely, 2^147070921 is an apocalyptic number.

It is an amenable number.

147070921 is a deficient number, since it is larger than the sum of its proper divisors (1).

147070921 is an equidigital number, since it uses as much as digits as its factorization.

147070921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 147070921 is about 12127.2800330495. The cubic root of 147070921 is about 527.8480692820.

The spelling of 147070921 in words is "one hundred forty-seven million, seventy thousand, nine hundred twenty-one".