147490309 has 2 divisors, whose sum is σ = 147490310. Its totient is φ = 147490308.

The previous prime is 147490297. The next prime is 147490319. The reversal of 147490309 is 903094741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98069409 + 49420900 = 9903^2 + 7030^2 .

It is a cyclic number.

It is not a de Polignac number, because 147490309 - 2¹³ = 147482117 is a prime.

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 (147490319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73745154 + 73745155.

It is an arithmetic number, because the mean of its divisors is an integer number (73745155).

Almost surely, 2^147490309 is an apocalyptic number.

It is an amenable number.

147490309 is a deficient number, since it is larger than the sum of its proper divisors (1).

147490309 is an equidigital number, since it uses as much as digits as its factorization.

147490309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 147490309 is about 12144.5588227815. The cubic root of 147490309 is about 528.3493309737.

The spelling of 147490309 in words is "one hundred forty-seven million, four hundred ninety thousand, three hundred nine".