674220409 has 2 divisors, whose sum is σ = 674220410. Its totient is φ = 674220408.

The previous prime is 674220361. The next prime is 674220419. The reversal of 674220409 is 904022476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495196009 + 179024400 = 22253^2 + 13380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674220409 is a prime.

It is not a weakly prime, because it can be changed into another prime (674220419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337110204 + 337110205.

It is an arithmetic number, because the mean of its divisors is an integer number (337110205).

Almost surely, 2^674220409 is an apocalyptic number.

It is an amenable number.

674220409 is a deficient number, since it is larger than the sum of its proper divisors (1).

674220409 is an equidigital number, since it uses as much as digits as its factorization.

674220409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 674220409 is about 25965.7545432441. The cubic root of 674220409 is about 876.8674820476.

The spelling of 674220409 in words is "six hundred seventy-four million, two hundred twenty thousand, four hundred nine".