4221453949 has 2 divisors, whose sum is σ = 4221453950. Its totient is φ = 4221453948.

The previous prime is 4221453811. The next prime is 4221453961. The reversal of 4221453949 is 9493541224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3792342724 + 429111225 = 61582^2 + 20715^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221453949 - 2⁹ = 4221453437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221453149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110726974 + 2110726975.

It is an arithmetic number, because the mean of its divisors is an integer number (2110726975).

Almost surely, 2^4221453949 is an apocalyptic number.

It is an amenable number.

4221453949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221453949 is an equidigital number, since it uses as much as digits as its factorization.

4221453949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 4221453949 is about 64972.7169587358. The cubic root of 4221453949 is about 1616.1711575169.

The spelling of 4221453949 in words is "four billion, two hundred twenty-one million, four hundred fifty-three thousand, nine hundred forty-nine".