451955891 has 2 divisors, whose sum is σ = 451955892. Its totient is φ = 451955890.

The previous prime is 451955839. The next prime is 451955899. The reversal of 451955891 is 198559154.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 451955891 - 2⁶ = 451955827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (451955899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225977945 + 225977946.

It is an arithmetic number, because the mean of its divisors is an integer number (225977946).

Almost surely, 2^451955891 is an apocalyptic number.

451955891 is a deficient number, since it is larger than the sum of its proper divisors (1).

451955891 is an equidigital number, since it uses as much as digits as its factorization.

451955891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 47.

The square root of 451955891 is about 21259.2542437405. The cubic root of 451955891 is about 767.4180630980.

The spelling of 451955891 in words is "four hundred fifty-one million, nine hundred fifty-five thousand, eight hundred ninety-one".