3914767621 has 2 divisors, whose sum is σ = 3914767622. Its totient is φ = 3914767620.

The previous prime is 3914767607. The next prime is 3914767669. The reversal of 3914767621 is 1267674193.

3914767621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2934388900 + 980378721 = 54170^2 + 31311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3914767621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3914767421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957383810 + 1957383811.

It is an arithmetic number, because the mean of its divisors is an integer number (1957383811).

Almost surely, 2^3914767621 is an apocalyptic number.

It is an amenable number.

3914767621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3914767621 is an equidigital number, since it uses as much as digits as its factorization.

3914767621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 3914767621 is about 62568.1038629109. The cubic root of 3914767621 is about 1576.0451778998.

The spelling of 3914767621 in words is "three billion, nine hundred fourteen million, seven hundred sixty-seven thousand, six hundred twenty-one".