147126989 has 2 divisors, whose sum is σ = 147126990. Its totient is φ = 147126988.

The previous prime is 147126977. The next prime is 147127007. The reversal of 147126989 is 989621741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142611364 + 4515625 = 11942^2 + 2125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147126989 is a prime.

It is a super-2 number, since 2×147126989² = 43292701784412242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147126919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73563494 + 73563495.

It is an arithmetic number, because the mean of its divisors is an integer number (73563495).

Almost surely, 2^147126989 is an apocalyptic number.

It is an amenable number.

147126989 is a deficient number, since it is larger than the sum of its proper divisors (1).

147126989 is an equidigital number, since it uses as much as digits as its factorization.

147126989 is an odious number, because the sum of its binary digits is odd.

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

The square root of 147126989 is about 12129.5914605563. The cubic root of 147126989 is about 527.9151381157.

The spelling of 147126989 in words is "one hundred forty-seven million, one hundred twenty-six thousand, nine hundred eighty-nine".