3548668421 has 2 divisors, whose sum is σ = 3548668422. Its totient is φ = 3548668420.

The previous prime is 3548668411. The next prime is 3548668427. The reversal of 3548668421 is 1248668453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3548584900 + 83521 = 59570^2 + 289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3548668421 is a prime.

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 (3548668427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1774334210 + 1774334211.

It is an arithmetic number, because the mean of its divisors is an integer number (1774334211).

Almost surely, 2^3548668421 is an apocalyptic number.

It is an amenable number.

3548668421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3548668421 is an equidigital number, since it uses as much as digits as its factorization.

3548668421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 47.

The square root of 3548668421 is about 59570.7010282740. The cubic root of 3548668421 is about 1525.2995446345.

The spelling of 3548668421 in words is "three billion, five hundred forty-eight million, six hundred sixty-eight thousand, four hundred twenty-one".