4455691421 has 2 divisors, whose sum is σ = 4455691422. Its totient is φ = 4455691420.

The previous prime is 4455691379. The next prime is 4455691447. The reversal of 4455691421 is 1241965544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4113811321 + 341880100 = 64139^2 + 18490^2 .

It is a cyclic number.

It is not a de Polignac number, because 4455691421 - 2¹⁰ = 4455690397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4455691451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2227845710 + 2227845711.

It is an arithmetic number, because the mean of its divisors is an integer number (2227845711).

Almost surely, 2^4455691421 is an apocalyptic number.

It is an amenable number.

4455691421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4455691421 is an equidigital number, since it uses as much as digits as its factorization.

4455691421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The square root of 4455691421 is about 66750.9656933890. The cubic root of 4455691421 is about 1645.5270861396.

The spelling of 4455691421 in words is "four billion, four hundred fifty-five million, six hundred ninety-one thousand, four hundred twenty-one".