1673749409 has 2 divisors, whose sum is σ = 1673749410. Its totient is φ = 1673749408.

The previous prime is 1673749373. The next prime is 1673749417. The reversal of 1673749409 is 9049473761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1385700625 + 288048784 = 37225^2 + 16972^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673749409 - 2¹² = 1673745313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1673749439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836874704 + 836874705.

It is an arithmetic number, because the mean of its divisors is an integer number (836874705).

Almost surely, 2^1673749409 is an apocalyptic number.

It is an amenable number.

1673749409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673749409 is an equidigital number, since it uses as much as digits as its factorization.

1673749409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 1673749409 is about 40911.4826057429. The cubic root of 1673749409 is about 1187.3082319178.

The spelling of 1673749409 in words is "one billion, six hundred seventy-three million, seven hundred forty-nine thousand, four hundred nine".