3934090621 has 2 divisors, whose sum is σ = 3934090622. Its totient is φ = 3934090620.

The previous prime is 3934090607. The next prime is 3934090651. The reversal of 3934090621 is 1260904393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2429504100 + 1504586521 = 49290^2 + 38789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3934090621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3934090651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1967045310 + 1967045311.

It is an arithmetic number, because the mean of its divisors is an integer number (1967045311).

Almost surely, 2^3934090621 is an apocalyptic number.

It is an amenable number.

3934090621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3934090621 is an equidigital number, since it uses as much as digits as its factorization.

3934090621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 3934090621 is about 62722.3295246597. The cubic root of 3934090621 is about 1578.6340034934.

The spelling of 3934090621 in words is "three billion, nine hundred thirty-four million, ninety thousand, six hundred twenty-one".