1749248621 has 2 divisors, whose sum is σ = 1749248622. Its totient is φ = 1749248620.

The previous prime is 1749248603. The next prime is 1749248653. The reversal of 1749248621 is 1268429471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1737722596 + 11526025 = 41686^2 + 3395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1749248621 - 2²⁶ = 1682139757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1749248671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874624310 + 874624311.

It is an arithmetic number, because the mean of its divisors is an integer number (874624311).

Almost surely, 2^1749248621 is an apocalyptic number.

It is an amenable number.

1749248621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1749248621 is an equidigital number, since it uses as much as digits as its factorization.

1749248621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 1749248621 is about 41824.0196657375. The cubic root of 1749248621 is about 1204.8986378470.

The spelling of 1749248621 in words is "one billion, seven hundred forty-nine million, two hundred forty-eight thousand, six hundred twenty-one".